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》

If you cannot go yourself, try to find someone to substitute you.

如果你不能亲自去，试着找人代替你。

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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.

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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.

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