Then, bending his ear down over the nearest gourd, which was as high as his gut and wider than a truck tire, he gave it a solid smack and listened intently, like a doctor with a stethoscope.

他像一个带着听诊器的医生一样，认真地扣、仔细地听这个葫芦。

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There is no substitute for the trained ear and the feeling you get from watching live performances when it comes to determining whether an artist is solid or not.

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