其中一个机械师取下受损轮胎，把它拿到站里修补。
One of the mechanics took off the damaged tyre, and took it back to the station to be patched.
还有更复杂的方法，其中一些是机械的。
There are more sophisticated approaches, some of them are mechanical.
如果我们想在其中任何一种环境中生存一段时间，我们都需要机械辅助。
If we wish to survive in either for any length of time, we need to have mechanical aids.
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