不懂的地方请教老师或同学，决不放过任何一个难点和疑点。

The place that don't understand ask teacher or classmate, will never pass whichever crux and doubtful point.

youdao

不懂的地方请教老师或同学，决不放过任何一个难点和疑点。

The place that don't understand ask teacher or classmate, will never pass whichever crux and doubtful point.

youdao