Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.
细胞生命期可以停止在细胞周期的某个点,并保持很长时间
A lot of these processed foods have very long shelf lives and therefore can be stored for long periods of time.
很多加工食品为了便于储藏销售,都有很长的保质期
Moreover, the kids we have are vulnerable for long periods of time and require our resources.
而且,我们的孩子很长一段时间,易受伤害,我们需要保护它们。
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