She used a slither of tooth enamel the size of a nail clipping to trace his origins.

埃文斯通过大小相当于小钉的牙齿瓷釉（珐琅）质，来确定他的来历。

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Even if you accidentally hurt them during a grooming or nail clipping section, they always forgive you.

即使如果你在为它们剪毛或者指甲时不小心弄伤了它们，它们还是会原谅你。

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The deeper the needle penetrated, the more flexible the nail. (The squeamish may wish to note that this test can be done using a fingernail clipping.) In a test of 30 people, Dr Towler found that the nails of those with osteoporosis were significantly softer than those of people without it.

ECONOMIST: Medicine