我要是不留神，他就会出事。

Will you keep an eye on the children? 你可以照看一下孩子们吗？

4. I totally agree with the American idea of "three strikes and out" - that after committing three crimes criminals are locked up for life. 我完全认可美国人的观点"事不过三"，即犯三次罪就终身监禁。

5. The only time that life sentences should be given is when a person is so dangerous that the community is at risk if he or she is let out of prison. 判死刑的唯一条件是：罪犯十分危险，一旦他或她被释放出狱，周围的人们就要遭殃。

at risk 有危险，冒险。如：

The man's life was at risk when he was trying to save the girl.

那人去救女孩的时候是冒了很大生命危险的。

Heart trouble can be avoided if people at risk take medicinal advice.

如果高危人群遵循医嘱，心脏病是可以避免的。

risk 常见短语还有：

at the risk of (doing sth.) 冒......之险（做某事）

At the risk of sounding ungrateful, I must refuse your offer.

我甘受佛逆盛情之嫌，也必须谢绝你的提议。

take a risk / risks 冒险

That's a risk I'm prepared to take. 那是我愿意冒险做的事情。

6. Measures to slow population growth like China's one-child policy, have also contributed to lowered birthrates. 缓解人口增长速度的措施，如中国的独生子女政策，对降低人口出生率也起了作用。

　contribute to 捐献，贡献；起促成作用。如：

　Various factors contributed to his failure. 多种因素导致了他的失败。

　That advertisement contributed a great deal to the sale of the new car.

　那则广告曾为这款新车打开销路起了很大作用。

7. The civilisations that reached these "golden ages" hail from around the world, and made their mark on history through exceptional leaps forward in cultural, scientific and social achievements. 这些曾达到过"黄金时代"的文明起源于世界各地，它