慢速英语:Walking: The 'Wonder Drug'

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短语讲解：

1.If you want to get healthy or stay healthy, there is one easy activity to add to your day – walking.

add to 增加， 加强;
例句：I have nothing to add to my earlier statement.
我对我先前说的话, 没有什麽补充的。

2.You can take the stairs instead of the elevator.

instead of （用…） 代替…， （是…）而不是…
例句：I should take my rest now instead of later.
我现在就得休息，而不是一会。

3.You can do a little at a time, or as we like to say, take "baby steps."

at a time 依次， 逐一， 每次
例句：Can I borrow two books at a time?
我可以一次借两本书吗？