a period of time的意思是什么

1.Then we dried them slowly, over a period of many months 。

要慢慢地把它们晾干，我们又得等上几个月。

2.You cannot but know that we live in a period of chastisement and ruin 。

你们必须认识到我们生活在一个灾难深重、面临毁灭的时代。

3.Both his clothes and his general air had indicated a period of better days for him 。

他的衣着和他的气色，说明他的境况改善多了。

4.Regardless of the cost, it is usual for people to buy their houses over a period of time 。

不论价钱高低，人们通常要花一段时间才能买下房子。