据说他还对紧绷的弦，管子，贝壳和满载的船的固有振动频率进行了测试。
He is also reported to have experimented with the relationship between consonance and the natural frequencies of vibration of stretched strings, pipes, shells, and filled vessels.
事故警钟时时敲，安全之弦紧紧绷。
Accident alarm always knock, the string stretched tightly of safety.
只有心中紧绷这根弦，才能惜时如金，使每一个步骤的效率达到最高。
Only the hearts of tension in this string in order to pity, if gold, so that each step to achieve maximum efficiency.
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