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1·The stratification technique gives us the minimum age of an object, which isn't necessarilly its true age.

分层技术给我们提供一个物体的最小年龄，但不一定是它的真实年龄。

2·Many seeds require a period of stratification, exposure to low temperatures for some minimum period, before they will germinate.

许多种子在发芽前需要一段时间来分层，并在低温下储存一段时间。

3·The reason why many seeds require a period of stratification is to guarantee that the seeds grow after and not before unfavorable weather.

许多种子需要一段时间分层的原因是为了保证种子在恶劣的天气来临之后而不是之前生长。

4·She was concerned about the stratification of American society.

她以前很关注美国社会的阶层分化。《柯林斯英汉双解大词典》

5·The first step management is to make risk stratification.

处理的第一步是进行危险度分层。

6·Stratification in polar water normally is weak and transient.

极地水域的成层性是微弱而暂时的。

7·Stratification in polar waters normally is weak and transient.

极地水域的成层性是微弱而暂时的。

8·The stratification of beach deposits has been studied particularly.

对海滩沉积物的层理进行了着重研究。

9·There began to be considerable social stratification within this people.

而这个民族开始形成一个重要的社会阶层。

10·This is an important concept, which moves us toward risk stratification.

这是一个重要的概念，要求我们进行风险分层。

(1)stratification plane[地质]层面；层理面

(1)social stratification社会分层，社会阶层化

(1)thermal stratification热结层；温度分层；热分层现象