VOA慢速英语:Your Bones Are Alive! Learn How to Keep Them Strong

短语讲解：

1.When the growth of new bone tissue does not keep up with the loss of old bone tissue you may develop a medical condition called osteoporosis.

keep up with 紧跟; 跟上， 不落人之后
例句：She was skipping to keep up with him.
她连蹦带跳地走着，好跟上他的步伐。

2.Usually people get osteoporosis as a result of hormonal changes, or from a lack of calcium or vitamin D. White and Asian people are at higher risk for the disease.
 
as a result of 因; 由于…的结果; 起因
例句：As a result of this conflict he lost both his home and his means of livelihood.
这场冲突使他同时失去了住所和生计来源。

3.According to several health websites, our bones are at their strongest between the ages of 20 to 30.

according to 根据，按照
例句：Philip stayed at the hotel, according to Mr Hemming
据亨明先生所说，菲利普住在旅馆里。

4.These impact exercises will help to build up bone mass needed later in life.

build up 逐步建立; 增进; （在某个地方） 盖满了建筑物
例句：The regime built up the largest army in Africa
该政权逐渐建立起一支非洲规模最大的军队。

5.I want to be able to be strong and healthy throughout the rest of my life.

be able to 能够; 能，会
例句：They may be able to help with childcare so that you can have a break
他们可以帮忙照料孩子，这样你就可以歇一歇了。

6.Get enough calcium and vitamin D. New research shows that vitamin K may also be good for your bones.

be good for 值得，有效; 利于;
例句：Do it up. It'll be good for you.
把它喝完，它对你有益。