controlled variable

简明释义

控制量

英英释义

例句

1.When studying the effects of light on photosynthesis, temperature should be a controlled variable 控制变量.

在研究光对光合作用影响时，温度应该是一个控制变量 控制变量。

2.The pH level of the soil was maintained as a controlled variable 控制变量 during the experiment.

在实验期间，土壤的pH值被维持为一个控制变量 控制变量。

3.In a clinical trial, patient age can serve as a controlled variable 控制变量 to ensure consistent results.

在临床试验中，患者年龄可以作为一个控制变量 控制变量以确保结果的一致性。

4.In an experiment to test plant growth, the amount of water given is a controlled variable 控制变量.

在测试植物生长的实验中，给予的水量是一个控制变量 控制变量。

5.In a cooking experiment, the cooking time is a controlled variable 控制变量 that affects the outcome.

在烹饪实验中，烹饪时间是一个控制变量 控制变量，会影响结果。

作文

In scientific experiments, understanding the various components that contribute to the outcome is crucial for drawing accurate conclusions. One essential aspect of experimental design is the identification and control of variables. Among these variables, the term controlled variable refers to factors that are kept constant throughout an experiment to ensure that any changes in the dependent variable can be attributed solely to the manipulation of the independent variable. This concept is fundamental in maintaining the integrity of an experiment and ensuring reliable results.For instance, consider a scenario where a researcher is investigating the effect of different fertilizers on plant growth. In this case, the independent variable would be the type of fertilizer used, while the dependent variable would be the growth rate of the plants. To accurately assess the impact of each fertilizer, the researcher must identify and maintain several controlled variables. These could include the amount of water each plant receives, the type of soil used, the amount of sunlight the plants are exposed to, and the temperature of the environment.By keeping these controlled variables constant, the researcher ensures that any differences observed in plant growth can be directly linked to the specific fertilizers being tested. If the amount of sunlight varied between plants or if different types of soil were used, it would be difficult to determine whether the fertilizer itself was effective or if other factors were influencing the results.The importance of controlled variables extends beyond botany and agriculture. In psychology experiments, for example, researchers often study the effects of different stimuli on behavior. Here, controlled variables might include the time of day when experiments are conducted, the location of the study, and the demographics of the participants. By controlling these factors, researchers can isolate the effects of the stimuli and draw more precise conclusions about human behavior.Moreover, in clinical trials for new medications, maintaining controlled variables is vital for ensuring the safety and efficacy of the treatment being tested. Researchers must control factors such as patient age, gender, pre-existing health conditions, and even the dosage of the medication. This level of control helps to eliminate confounding variables that could skew the results of the trial, allowing for a clearer understanding of the medication's effects.In conclusion, the concept of controlled variable is a cornerstone of scientific research. By identifying and maintaining controlled variables, researchers can create a more reliable experimental framework that leads to valid conclusions. Whether in the fields of biology, psychology, or medicine, the rigorous control of variables allows scientists to isolate the effects of independent variables and understand their relationship with dependent variables. As students and professionals in the scientific community, recognizing the significance of controlled variables is essential for conducting meaningful research and contributing to the advancement of knowledge in various disciplines.

在科学实验中，理解影响结果的各种因素对于得出准确结论至关重要。实验设计的一个重要方面是识别和控制变量。在这些变量中，术语controlled variable指的是在整个实验过程中保持不变的因素，以确保因变量的任何变化仅能归因于自变量的操控。这个概念是维持实验完整性和确保可靠结果的基础。例如，考虑一个研究者正在调查不同肥料对植物生长影响的场景。在这种情况下，自变量将是使用的肥料类型，而因变量则是植物的生长速率。为了准确评估每种肥料的影响，研究者必须识别并维持几个controlled variables。这些变量可能包括每株植物接受的水量、使用的土壤类型、植物暴露的阳光量以及环境温度。通过保持这些controlled variables不变，研究者确保观察到的植物生长差异可以直接与所测试的特定肥料相关联。如果植物之间的阳光量不同，或者使用了不同类型的土壤，那么就很难确定肥料本身是否有效，还是其他因素在影响结果。controlled variables的重要性超越了植物学和农业。在心理学实验中，例如，研究者通常研究不同刺激对行为的影响。在这里，controlled variables可能包括实验进行的时间、研究地点和参与者的人口统计特征。通过控制这些因素，研究者可以孤立刺激的影响，更加精确地得出关于人类行为的结论。此外，在新药物的临床试验中，保持controlled variables对于确保所测试治疗的安全性和有效性至关重要。研究者必须控制患者的年龄、性别、既往健康状况，甚至药物剂量。这种控制水平有助于消除可能扭曲试验结果的混杂变量，使对药物效果的理解更加清晰。总之，controlled variable的概念是科学研究的基石。通过识别和维护controlled variables，研究者可以创建一个更可靠的实验框架，从而得出有效的结论。无论是在生物学、心理学还是医学领域，严格控制变量使科学家能够孤立自变量的影响，并理解它们与因变量的关系。作为科学界的学生和专业人士，认识到controlled variables的重要性对于进行有意义的研究和推动各学科知识的进步至关重要。