今天下午在体育馆有一场这两个年级的篮球赛。

There is going to be a basketball game between these two grades in the gym this afternoon.

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表明，在两个年级中，通过概念图教学均可提高学生生物学问题解决能力。

Shows that in two grades, through concept maps of teaching biology could improve students problem-solving abilities.

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我和爸爸、辅导员、历史老师和英语老师开了个会，是因为爸爸关心我在这那两个年级的成绩。

I had a conference with my dad, my counselor, and my history and English teachers because my dad was "concerned" about my grades in those two classes.

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And the nucleus name was used as an analogy to the nucleus of a cell so in some ways that makes it easier to see the connection but I think it can also be a little bit confusing for maybe 7th graders that are learning both at the same time, that this nucleus acts very different from a nucleus in a cell, although, of course, there many of them in the nucleus of a cell.

原子核这个名字的命名,是类似于细胞核,这样会让人们更容易看到两者之间的联系,但我觉得这样可能,会给正在学这两个课程的,7年级学生带来困惑，原子核的行为,和细胞核完全不同，虽然在细胞核。

麻省理工公开课 - 化学原理课程节选