求翻译：做实践的目的应该是帮助学生生成知识。就做实验来说，美国老师首先在课堂里把科学现象告诉学生，然后让学生做实验，并对实验过程加以体会，最后通过作业的方式让学生得到新知识的思维模块。因此美国的科学教师注重动手操作。我国科学课程的实验往往被视为学习的“附加品”，可做可不做。学生先在老师讲课中学习到知识，然后在作业中巩固知识。由于过分强调理论学习，演示与实验活动常常被忽视，学生建构的新知识模块缺少在动手过程中情感、意志、价值观的体验与融入。是什么意思？

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So the practice should be aimed at helping students build knowledge. In doing so, the US lab teacher in the classroom, the first scientific phenomenon told the students, and then let the students doing experiments, and experiments to be realized, and finally through the job in a manner that allows s

Makes the practice the goal to be supposed to be helps the student to produce the knowledge.On does the experiment, American teacher first in the classroom the scientific phenomenon telling student, then lets the student do the experiment, and to tests the process to realize, finally lets the studen

Do practice the aim should be to help students build knowledge. As far as experimenting, United States teacher first told the students scientific phenomenon in the classroom, and then let the students do experiments, and experience the experimental procedure, and finally by thinking of ways to give

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