短语讲解：

1. The day encourages people to try bicycling to work instead of driving or taking a bus or train.

instead of （用…） 代替…， （是…）而不是…
例句：A spirit lamp burns spirits instead of oil.
酒精灯里点的不是油而是酒精。

2. It is good for your heath.

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。

3. Not being able to use the train has many people wondering how they will get around.

be able to 能够; 能
例句：He will be able to take up his normal routine shortly.
他不久就能处理日常事务。
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