Skeptics have argued that a single impact would raise an asteroid's overall temperature very little and that asteroids would cool too quickly between impacts to accumulate much heat.

怀疑派认为，一次撞击只会使小行星的整体温度上升很小，而且小行星在两次撞击之间会迅速冷却，从而无法积聚大量热量。

youdao

Yet she managed to raise two children as a single mother without one.

但她没办法提高作为一个两个孩子单身母亲。

youdao

She says single mothers often ask their parents to raise their grandchildren so the kids don't have to endure the shame of living without a father figure.

她说，单身母亲通常会向她们的父母寻求帮助以照顾她们的孙子，使孩子不必忍受没有父亲而受到屈辱。

youdao

You will retain your reputation for honesty, and, in my experience, this will serves you far better than a single raise or promotion ever could.

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The producers of a charity single to raise money for children's cancer charities have said they have not been paid by music retailer HMV.

BBC: HMV fail to pay money owed to cancer charities

With all that math practice, Google could probably single-handedly raise the SAT scores of all high school students.

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