We may indeed graft living branch to living tree, or living part of animal or man to other living part, but it is not life with which we are working; it is form only.

我们确实可以把活着的树枝嫁接到活着的树上面，或者是把动物活人身上活着的部分移植到到其他活的部分上面，但这并不是我们正与之共事的生活，它仅仅是形式。

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From the discussion above, working or living in big city is not the only way to success or live a happy life.

综上所述，在大城市工作或生活并不是成功的唯一出路，也不是幸福生活的保证。

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Machinery safety is of great importance in machinery discipline, which has direct impact not only on the working stability of the machinery, but also on the life assurance of workers.

机械安全是机械学科的重要问题之一，机器工作的稳定性与操作工人的生命安全产生直接影响。

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