翻译：古筝通常是长方形的，依靠指甲拨动琴弦来发声

Zither is usually rectangular, relying on nails striking strings to make sounds.
一楼的真是太可笑了，楼上明明没人，分明是做贼心虚嘛，一看就是机器翻译的。。。。。

Guzheng usually rectangular, and relying on a nail struck strings to sound

楼上的都乱讲~~