农田生产力的提高使一些国家在粮食和牲畜方面能自给自足，并为防止饥荒提供了有效的保护。
The increased productivity from farmland made some countries self-sufficient in grain and livestock, and offered effective protection against famine.
国家的目标是否应是实施一项综合头盔法或更适宜地分阶段实行法律，使交通警察能承担这项新的责任？
Should countries aim to implement a comprehensive helmet law, or is it more appropriate to phase in a law, in order to allow the traffic police to manage the new responsibility?
离婚是因为婚姻使双方走入了围城，但是他们比其它国家的人能更快的再婚，进而又使他们陷入了围城。
Divorce is central because it causes people to step off the marriage-go-round, but then they re-partner faster than in any other country, which makes them step on again.
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