他们相信自己在一段特定的时间后,有可能死亡。
They believe that there's a decent chance that they will die within a certain period of time.
他呆在一座特定用途的地堡里,已经有一段时间。
He was in a purpose-built bunker and had been there for some time.
精通某一特定领域需要相当长的一段时间。
Being proficient in a specific field requires a long period of time.
侯鸟在一特定的地方停留一段有限时间的一种迁移鸟类。
A migratory bird that stops in a particular place for a limited period of time.
留出一段安静的时间和特定地方用来坐下来烦心。
留出一段安静的时间和特定地方用来坐下来烦心。
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