directed circuit造句

• When the contacts are connected into direct circuit , we can judge whether the contacts are open or not through analyzing the voltage instantaneous values across the two contacts
  当有触点电器的触头接入直流电路中时，可通过触头两端电压瞬时值来判断它是打开还是闭合。
• Firstly , a research is carried out to explore and analyze the students " pre - knowledge on several relevant topics including mechanics , thermodynamics , and direct circuit , which indicates that there already exists the understanding of the physics phenomena in students " mind before the physics lessons although their cognitive structures do not accord with the scientific viewpoints
  首先，采用调查方法对力学、热学和直流电路等主题学生相关的先验认识和理解进行探查和分析，表明了在进行物理课堂教学以前学生头脑中已存在对物理现象的认识和理解，这些认知结构与科学观点不相符合。