Their skins are tough and they have very sharp teeth.
他们的皮肤很粗糙，长着非常尖利的牙齿。
They launch the products and services that win customers in the teeth of tough competition.
他们在激烈竞争中推出的产品和服务总能赢得客户。
They launch the products and services that win customers in the teeth of tough competition.
他们在激烈竞争中推出的产品和服务总能赢得客户。
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