Please let us know if you cannot attend the meeting.

你若不能参加会议，请通知我们。

《牛津词典》

Even if you cannot close that gap, maybe you can close others, and doing so would be to the benefit of all concerned.

即使你不能缩小这一差距，也许可以弥合其他差距，这样做将对所有相关方都有好处。

youdao

You can substitute plain flour if you cannot find self-raising flour.

如果你找不到自发面粉，可以用普通面粉来代替。

《柯林斯英汉双解大词典》

If you cannot access our Web site, send the information to VOA Special English two-zero-two-three-seven USA.

VOA: special.2009.10.16

If you cannot make the office hours, again, contact the recitation instructor to make other arrangements.

再次说，如果你们在办公时间不方便，联系背诵课的老师,再安排安排。

麻省理工公开课 - 固态化学导论课程节选

And you just think that's just gone, if that sea decide to take that house, it's gone, you cannot do it.

这时你会想说，这房子肯定会被毁掉的，如果大海要毁掉它，它就会毁掉，做什么都没有用的。

普林斯顿公开课 - 人性课程节选

If you cannot integrate across systems, you cannot call yourself a truly integrated cloud.

FORBES: Names to Know in Big Data: Hitachi Data Systems (HDS)

If you cannot figure out why they are wrong, then you need to change your opinions.

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If you cannot describe your idea in 140 characters or less, try again until you can.

FORBES: Why Apple Uses 67 Characters To Describe The iPhone 5