The snag with most local anaesthetics is their lack of specificity.

大多数局部麻醉剂的问题是，它们的作用没有针对性。

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One of these was pain, operations had to be done without anaesthetics.

一个原因是疼痛，做手术没有麻醉剂。

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One of these was pain, operations had to be done without anaesthetics.

一个原因是疼痛，做手术没有麻醉剂。

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