However, when the researchers applied both techniques to teeth, they realized that the racemization offered an additional useful detail, a good gauge of an individual's age at death.
然而，当研究人员将两项技术一并运用于牙齿上，他们意识到外消旋化提供了一个额外的有用细节，能成为个体死亡年龄的良好衡量标准。
Suddenly, an awesome Antarctic seal with sharp teeth appeared opposite him. Every cell in his body was scared to death.
突然，一只长着尖利牙齿、使人畏惧的南极海豹出现在他对面。
My beak is unlike other birds whose are sharp , and mine is flat. After I broke the egg and went out by the skin of my teeth, I was tired to death.
由于我的嘴喙不像大部分的鸟是尖的，我的是平的，因此当我好不容易破蛋而出以后，我差点没累死！
They started lips death and teeth cold, have lost the security sense, thought not only own finance not to be able to obtain the safeguard, family member's safety also with difficulty safeguards.
他们开始唇亡齿寒，失去了安全感，觉得不但自己财务不能得到保障，家庭成员的安全也难以保障。
However, the audience may imagine that the actor escaped a terrible death by the skin of his teeth.
然而观众可能会认为这们演员是虎口脱险，幸免惨死的。
However, the audience may imagine that the actor escaped a terrible death by the skin of his teeth.
然而观众可能会认为这们演员是虎口脱险，幸免惨死的。
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