如果头痛只发生在晚上，缺少新鲜空气和氧气常常是其原因。

If headaches only occur at night, lack of fresh air and oxygen is often the cause.

《柯林斯英汉双解大词典》

如果你要修理轮子，只拧下那4个螺母就行了。

If you want to repair the wheels you just undo the four nuts.

《柯林斯英汉双解大词典》

“如果它只属于我一个人，”男人说，“你应该得到它。”

"If it belonged to me alone," said the man, "you should have it."

youdao

If you just have the first half, That that development is accomplished when Richard decides to leave the South.

如果你只看书的前面，你可能认为但理查，下定决心离开南方时,故事就此完结了。

耶鲁公开课 - 1945年后的美国小说课程节选

But in terms of like, if you're living here day to day, you just kind of see two.

但是就那样而言，如果你天天住在这里，你大概只可以看到两个季节。

关于伦敦的天气 - SpeakingMax英语口语达人

Some people say, well if that's the case I want to invest in nothing more than that one asset.

一些人会说,如果真的如此,我只会投资收益较高的那项资产

耶鲁公开课 - 金融市场课程节选