• 1. 叶
  注意：所有术语都来自我个人的翻译实践，版权所有，未经许可严禁转载！...叶 leaf foliage frondage part of a hisorical period...叶上有绒毛的eriophyllous
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1. The first or early part of a period of time. 
   （时间的）前段一段时间的最开始或开头部分
2. any period of time during which glaciers covered a large part of the earth's surface. 
   从前寒武世纪以来地球地面大部分被冰川所覆盖的任何地质年代。
3. A period of apprenticeship. 
   学徒期
4. Have a period of misfortune 
   倒霉的时候；背运之时
5. and though the labours of the agriculturist are not necessarily continuous during the whole period, they must occupy a considerable part of it. 
   农民的劳动虽然不一定在整个时期都持续进行，但肯定会占用相当长一段时间。

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