William measured the mechanical power of the mechanism. He thought that chould be done by mean of electricity.

威廉测量了机械装置的机械功率，他认为可以借助于电力来解决问题。

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During the speech , a speaker should pay attention to the language art of the speech in the start . He chould also master the language skill to make the speech successful .

演讲者在演讲过程中，应注意研究演讲开场的语言艺术，掌握言语技巧，使演讲获得成功。

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During the speech , a speaker should pay attention to the language art of the speech in the start . He chould also master the language skill to make the speech successful .

演讲者在演讲过程中，应注意研究演讲开场的语言艺术，掌握言语技巧，使演讲获得成功。

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