weaken是什么意思？

It weakens in one's later years.

Does that mean the link between lower oil prices and growth has weakened?Some experts say there are still good reasons to believe cheap oil should heat up the world economy.

In the long run, the Depression weakened American families, and the current crisis will probably do the same.

It will gradually weaken the eyes of adults.

For instance, some people believe that wearing glasses too soon weakens the eyes.

Generous parental leave policies and readily available part-time options have unintended consequences:instead of strengthening women's attachment to the workplace,they appear to weaken it.

He felt troubled about the weakening of American craftsmanship.

Inevitably however, the day came when she was so weakened that she had to return to Pittsburgh, her home town.

Apple argues that it is fighting to preserve a principle that most of us who are addicted to our smartphones can defend: Weaken a single iPhone so that its contents can be viewed by the American government and you risk weakening all iPhones for any govern