如果你有一个树桩，就在上面找找菌类。

If you have a tree stump, check it for fungus.

《柯林斯英汉双解大词典》

如果你有一个学校记事簿，要充分利用它来记录你需要做什么。

If you have a planner for school, make good use of it to record what you need to do.

youdao

如果你有一个创造性的头脑，没有什么是浪费。

Nothing is a waste if you have a creative mind.

youdao

bug It's not true now. If there is a bug in the program it's there for only one reason.

如果程序中有一个,那一定是有原因的，是你通过例如犯了。

麻省理工公开课 - 计算机科学及编程导论课程节选

You have to have a good public transportation system when you have as many people here as we do.

如果你那儿和我们这儿的人一样多，你们得有一个良好的公共交通系统。

纽约的交通手段 - SpeakingMax英语口语达人

So, now you have a single molecule, very large molecule, with not just two binding sites but with ten binding sites.

所以如果你体内有一个细胞,一个体积很大的细胞,细胞表面不只有两个抗原结合位点,而有十个抗原结合位点

耶鲁公开课 - 生物医学工程探索课程节选