catapult

简明释义

英[ˈkætəpʌlt]美[ˈkætəpʌlt]

n. 弹弓；石弩；（从舰船上弹射飞机的）弹射器；（飞机上的）座椅弹射器

v. 猛投；用弹弓射，用弹射器发射；（仿佛被弹射般地）突然快速移动；使突然处于

复 数 c a t a p u l t s

第 三 人 称 单 数 c a t a p u l t s

现 在 分 词 c a t a p u l t i n g

过 去 式 c a t a p u l t e d

过 去 分 词 c a t a p u l t e d

英英释义

单词用法

同义词

反义词

例句

1.But Brazilian star pele in the early 1980s and Britain's David Beckham more recently failed to catapult soccer into the mainstream.

但是从早期上世纪80年代的巴西巨星贝利到近期英国的贝克·汉姆谁也没有成功将足球带入美国的主流社会当中。

2.The assertions are like springs that catapult us back to the guard.

这种断言就象弹簧一样将我们弹回到防护处。

3.To hurl or launch from or as if from a catapult.

弹弓的日子一去不复返了。

4.It's the same principle as a catapult.

这与弹射器是一个道理。

5.The child broke his neighbor's window with a catapult.

这孩子用绷弓子打碎了邻居家的玻璃。

6.Touch and move trigger of catapult and see changes of power.

触摸和移动触发弹射器，看到力的转变。

7.A 41 per cent appreciation in the renminbi would catapult China way beyond Japan and leave it half the size of the US.

如果人民币升值41%，中国的经济规模将骤增至美国的一半，遥遥领先于日本。

8.With a press of a button, the object is attached to your hand, but stays at that fixed distance, turning your hand into a catapult.

按下一个按钮，物体就被附着在了手里，但是它在固定的距离，把手变成一个弹射器。

9.The new marketing strategy will likely catapult our sales to record highs.

新的营销策略可能会将我们的销售投射到创纪录的高点。

10.His performance in the competition could catapult him to fame.

他在比赛中的表现可能会使他迅速成名。

11.The viral video catapulted the creator to internet stardom.

这段病毒视频迅速提升了创作者的网络明星地位。

12.The athlete's record-breaking jump catapulted him into the national team.

这位运动员打破记录的跳跃将他迅速推入了国家队。

13.The technology startup was catapulted into the spotlight after receiving major funding.

这家科技初创公司在获得重大资金后被迅速推向了聚光灯下。

作文

In the realm of physics and engineering, few devices capture the imagination quite like the catapult. This ancient weapon, which dates back to the times of the Greeks and Romans, was used to hurl projectiles at enemy fortifications. The very concept of a catapult—a mechanism that converts potential energy into kinetic energy—illustrates fundamental principles of mechanics that are still relevant today. Understanding how a catapult works can not only enhance our appreciation for historical warfare but also deepen our insight into modern engineering principles.At its core, a catapult operates on the principle of stored energy. When the arm of the catapult is pulled back, it stores potential energy in the form of tension or compression. Once released, this energy is converted into kinetic energy, propelling the projectile forward. This transformation of energy is a classic example of Newton's laws of motion, particularly the second law, which states that force equals mass times acceleration. The effectiveness of a catapult can be influenced by various factors, including the angle of release, the type of projectile, and the materials used in its construction.Historically, catapults were pivotal during sieges. They allowed armies to breach walls without direct confrontation, often causing chaos and destruction from a distance. The psychological impact of a catapult attack cannot be understated; the sight of large stones or burning projectiles flying through the air would instill fear in defenders. In many ways, the catapult symbolizes the ingenuity of human engineering, showcasing how technology can change the dynamics of warfare.In contemporary times, while catapults are no longer used in battle, their principles have been adapted for various applications. For instance, they can be seen in amusement park rides, where similar mechanisms launch thrill-seekers into the air. Additionally, the basic design of a catapult has inspired innovations in various fields, such as aerospace engineering, where similar principles are applied in launching spacecraft.Moreover, the term catapult has also found its way into everyday language, often used metaphorically. For example, one might say that a particular event served to catapult someone's career forward, indicating a sudden and significant advancement. This metaphorical use highlights how the concept of launching something into a new trajectory resonates beyond its original context.In educational settings, catapults serve as excellent teaching tools. Students can build their own miniature catapults, allowing them to explore concepts such as energy transfer, angles, and force in a hands-on manner. These projects not only make learning fun but also encourage critical thinking and problem-solving skills.In conclusion, the catapult is more than just an ancient weapon; it is a fascinating study of physics and engineering principles. Its historical significance, combined with its modern applications and metaphorical uses, makes it a compelling subject of study. Whether in the context of medieval warfare or contemporary education, the catapult continues to inspire curiosity and innovation, reminding us of the enduring power of human creativity and ingenuity.

在物理和工程领域，很少有设备能像投石机那样引人入胜。这种古老的武器可以追溯到希腊和罗马时期，用于向敌方防御工事投掷弹药。投石机的概念——一种将势能转化为动能的机制——展示了机械学的基本原理，这些原理在今天仍然适用。理解投石机的工作原理不仅能增强我们对历史战争的欣赏，还能加深我们对现代工程原理的洞察。从根本上讲，投石机基于储存能量的原理。当投石机的臂杆被拉回时，它以张力或压缩的形式储存势能。一旦释放，这种能量就会转化为动能，推动弹药向前飞去。这种能量的转化是牛顿运动定律的经典例子，特别是第二定律，即力等于质量乘以加速度。影响投石机有效性的因素有很多，包括发射角度、弹药类型和其构造材料。在历史上，投石机在围攻战中至关重要。它们使军队能够在没有直接对抗的情况下攻破城墙，常常在远处造成混乱和破坏。投石机攻击的心理影响不容小觑；大石头或燃烧弹药飞过空中的场景会在防守者心中激起恐惧。从某种意义上说，投石机象征着人类工程的创造力，展示了技术如何改变战争的动态。在当代，虽然投石机不再用于战斗，但其原理已被应用于各种场合。例如，在游乐园的游乐设施中，可以看到类似的机制将惊险者发射到空中。此外，投石机的基本设计也启发了各个领域的创新，例如航空航天工程，类似的原理被应用于发射航天器。此外，投石机这个词也逐渐进入了日常语言，通常用于比喻。例如，人们可能会说某个事件帮助某人的职业生涯投石机般地向前推进，表示突然且显著的进步。这种比喻的使用突显了将某物发射到新轨迹的概念超越了其原始上下文的共鸣。在教育环境中，投石机是极好的教学工具。学生们可以制作自己的微型投石机，让他们以动手的方式探索能量转移、角度和力等概念。这些项目不仅让学习变得有趣，还鼓励批判性思维和解决问题的能力。总之，投石机不仅仅是一种古老的武器；它是物理和工程原理的迷人研究。它的历史意义，加上现代应用和比喻用法，使其成为一个引人注目的研究对象。无论是在中世纪战争的背景下还是当代教育中，投石机继续激发好奇心和创新，提醒我们人类创造力和智慧的持久力量。