controlled variable

简明释义

控制变量

英英释义

例句

1.In a clinical trial, the dosage of medication is a controlled variable 控制变量 to ensure accurate results.

在临床试验中，药物剂量是一个控制变量 controlled variable，以确保结果的准确性。

2.When studying the effects of temperature on chemical reactions, pressure is often a controlled variable 控制变量 that is regulated.

在研究温度对化学反应影响时，压力通常是一个控制变量 controlled variable，需要被调节。

3.In a survey about diet and weight loss, the participants' age can be considered a controlled variable 控制变量.

在关于饮食和减肥的调查中，参与者的年龄可以被视为一个控制变量 controlled variable。

4.For a physics experiment, the length of the pendulum is a controlled variable 控制变量 that affects the period of swing.

对于一个物理实验，摆的长度是一个控制变量 controlled variable，它影响摆动的周期。

5.In an experiment to test plant growth, the amount of sunlight is a controlled variable 控制变量 that must be kept constant.

在测试植物生长的实验中，阳光的数量是一个控制变量 controlled variable，必须保持不变。

作文

In scientific experiments, it is essential to understand the concept of a controlled variable. A controlled variable refers to any factor or condition that is kept constant throughout an experiment to ensure that the results are valid and reliable. By controlling these variables, researchers can isolate the effects of the independent variable on the dependent variable, thus drawing accurate conclusions from their data.For example, consider an experiment designed to test the effect of different amounts of sunlight on plant growth. In this case, the amount of sunlight would be the independent variable, while the growth of the plants would be the dependent variable. To accurately assess how sunlight affects growth, the researcher must identify and maintain several controlled variables. These could include the type of soil used, the amount of water given to the plants, the temperature of the environment, and the type of plants being tested. By keeping these factors constant, the researcher ensures that any changes in plant growth can be attributed solely to the varying amounts of sunlight.The importance of controlled variables cannot be overstated. They help eliminate alternative explanations for the results observed in an experiment. If one of the controlled variables were to change inadvertently, it could lead to misleading conclusions. For instance, if one group of plants received more water than another, it would be impossible to determine whether the difference in growth was due to sunlight exposure or the additional water. Therefore, maintaining controlled variables is crucial for the integrity of the experimental design.Moreover, understanding controlled variables is not only vital in laboratory settings but also in real-world applications. For instance, in clinical trials for new medications, researchers must control various factors such as patient age, sex, and health status to ensure the results are solely reflective of the drug's effectiveness. Any uncontrolled variables can skew the results and lead to incorrect conclusions about the medication's safety or efficacy.In summary, a controlled variable is a key component of any scientific study. It allows researchers to isolate the impact of the independent variable and ensures the reliability of the findings. By carefully identifying and maintaining controlled variables, scientists can produce credible results that contribute to our understanding of the world around us. This rigorous approach to experimentation is what sets scientific inquiry apart from other forms of knowledge acquisition, emphasizing the necessity of precision and control in research methodologies. Ultimately, mastering the concept of controlled variables is fundamental for anyone aspiring to engage in scientific research or even just to understand the scientific method more deeply.

在科学实验中，理解“受控变量”的概念至关重要。“受控变量”是指在实验中保持恒定的任何因素或条件，以确保结果的有效性和可靠性。通过控制这些变量，研究人员可以隔离自变量对因变量的影响，从而从数据中得出准确的结论。例如，考虑一个旨在测试不同阳光照射量对植物生长影响的实验。在这种情况下，阳光的照射量将是自变量，而植物的生长则是因变量。为了准确评估阳光对生长的影响，研究人员必须识别并保持几个受控变量。这些可能包括所用土壤的类型、给植物的水量、环境的温度以及所测试植物的类型。通过保持这些因素不变，研究人员确保任何植物生长的变化都可以归因于阳光照射量的变化。受控变量的重要性不容小觑。它们有助于消除对实验结果的其他解释。如果某个受控变量意外发生变化，可能会导致误导性的结论。例如，如果一组植物比另一组植物接受了更多的水，那么就无法确定生长差异是由于阳光照射还是额外的水。因此，保持受控变量的稳定性对于实验设计的完整性至关重要。此外，理解受控变量不仅在实验室环境中至关重要，而且在现实世界的应用中也同样重要。例如，在新药物的临床试验中，研究人员必须控制多种因素，如患者的年龄、性别和健康状况，以确保结果仅反映药物的有效性。任何未控制的变量都可能扭曲结果，并导致对药物安全性或有效性的错误结论。总之，受控变量是任何科学研究的关键组成部分。它允许研究人员隔离自变量的影响，并确保结果的可靠性。通过仔细识别和维护受控变量，科学家可以产生可信的结果，从而促进我们对周围世界的理解。这种严格的实验方法使科学探究与其他知识获取形式区分开来，强调在研究方法中精确性和控制的必要性。最终，掌握受控变量的概念是任何希望参与科学研究的人或任何希望更深入理解科学方法的人所必需的。