1. It still lies in the womb of time. 
   此事结果如何尚未可知。
2. There are many events in the womb of time. 
   有许多事件正在酝酿之中。
3. They have evolved into new social classes from the womb of feudal society.  
   它们从封建社会脱胎而来，构成了新的社会阶级。
4. Tightening of the womb that occurs at intervals in the hours preceding childbirth 
   （分娩时阵发性的）子宫收缩
5. Another technique is ultrasound, known by many for its pictures of babies in the womb. 
   另外一种技术是超声波，因为能看出子宫内胎儿的样于而被许多人了解。

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