如果你是棒球队球童，那么你就要为棒球队员拿球棒。

If you are a batboy, then you are holding the bat for the baseball players.

《柯林斯英汉双解大词典》

如果你下定决心要追求你的目标，那么你就要开始努力学习了。

If you make up your mind to pursue your goal, you should begin to study hard.

youdao

如果你为错过夕阳而哭泣，那么你就要错过群星了。

If you weeped for the missing sunset, you would miss all the shining stars.

youdao

I think those together really know your own limitations as a fallible mortal and then exercise moderation because you are not divine, you are mortal.

我认为这两句话的真谛是,凡人皆会有错,所以要了解自身的局限性,既然你是人不是神,那么就要适可而止,不要走极端

耶鲁公开课 - 古希腊历史简介课程节选

Well,you have to unroll different scrolls.

那么你就要展开很多卷。

耶鲁公开课 - 新约课程节选