周文王为他的儿子周武王增加了第六根琴弦，鼓励他的军队与商朝作战。

In the Zhou dynasty, King Wen of Zhou added a sixth string for his son King Wu of Zhou to encourage his army to fight with the Shang.

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后来到了周朝，周文王为儿子加了第六弦。

Later, in Zhou Dynasty, King Wen of Zhou added a sixth string for his son.

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信件和插图占据了五卷书；第六卷为评论、地图和索引。

Letters and illustrations fill five books; the sixth has commentaries, maps and indexes.

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The oboe may have the seventh partial very strong and the third partial very strong whereas the trumpet-- I'm just making all of this up of course-- the trumpet may have the second partial and the fourth partial and the sixth partial.

双簧管的第七泛音,和第三泛音都很强,而小号,我只是为上课需要假设的,小号可能是第二泛音,第四和第六泛音比较强

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