He could react jealously when and if another child comes on the scene.

如果有别的孩子加入其中，他可能会表现得相当嫉妒。

《柯林斯英汉双解大词典》

I consider you a good friend, and if it's all right with you, I'd like to keep it that way.

我把你看成一个好朋友，如果你认为可以的话，我想继续保持这样。

《柯林斯英汉双解大词典》

There is only so much fuel in the tank and if you burn it up too quickly you are in trouble.

油罐里只有这么多燃料了，如果你用得太快，就有麻烦了。

《柯林斯英汉双解大词典》

His real name was Theodore. And if there was ever a problem she could not handle, her husband put things right.

VOA: special.2009.05.04

The final exam: you should do well if you read, and if you come to lecture and if you attend section.

期末考：如果你读了，上课了，讨论了,期末考试对你来说将轻而易举。

耶鲁公开课 - 1945年后的美国小说课程节选

And if I don't do that. then I will apply to graduate school in comparative literature, probably in California

如果不行的话，我应该会申请去加利福尼亚大学的比较文学研究生院。

耶鲁的著名人士 - SpeakingMax英语口语达人

And if he is gone, when he is gone, there's bound to be some reconsideration.

NPR: Cuba (and Cuban Exiles) Ponder the Future

And if you think James would have made more than a marginal difference this year, think again.

FORBES: Kobe Isn't Magic In NBA Finals

And if the lawsuit is successful, they say damages could be worth hundreds of millions of dollars.

NPR: Native American Farmers Allege Loan Bias