Many already subsist on the mere threshold of survival.
许多人早已是仅仅能够维持生存。
Dinosaurs were most likely wiped out by a giant meteor that cooled Earth's temperatures below their threshold for survival.
恐龙的灭绝很可能是由于一颗巨大的流星导致地球温度降到了它们生存的临界值以下。
Dinosaurs were most likely wiped out by a giant meteor that cooled Earth's temperatures below their threshold for survival.
恐龙的灭绝很可能是由于一颗巨大的流星导致地球温度降到了它们生存的临界值以下。
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