Brothers and sisters are often willing to help, but they may not know what to do.

兄弟姐妹们往往愿意帮忙，但他们可能不知道该做什么。

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Stars are beautiful, but they may not take an active part in anything, they must just look on for ever.

星星是美丽的，但它们不能主动参与任何事情，它们只能永远旁观。

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But they may not have their dad.

但她们也许会失去父亲。

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Farmers may not be able to prevent natural disasters, but they can at least try their best to reduce losses.

VOA: special.2010.02.09

The fallen angels may be -- okay, they may be violating mother earth, not so great, but look what this violation produces.

这些堕落天使可能没有那么严重地侵略大地母亲，但是看看这侵略带来了什么。

耶鲁公开课 - 弥尔顿课程节选

It may not generate high income, but it can make them feel like they're making contributions in one way or another.

这样的工作可能不会带来高收入，但可以使他们觉得自己,在某些方面作出了贡献。

普林斯顿公开课 - 人性课程节选

Owners of Apple products surely have heard of iCloud, but they may not use it.

WSJ: iTunes You Can Use

An investor may have good investments, but they may not necessarily good for him.

FORBES: Prudent Investors Are Prepared To Take Advantage Of Market Volatility

But they may not necessarily feel like slogging through the dense prose of a literary study.

ECONOMIST: Theodor Seuss Geisel