We go back to the spring and we want to learn something about the spring.

我们回到弹簧的问题上来,我们要学习一些关于弹簧的知识

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Maybe you're talking with a friend about where you should go for spring break vacation,

假如你在跟一个朋友讨论你们该去哪里过春假。

I've already 课堂 - SpeakingMax英语口语达人