We think that an increase in the length of the dry season sometime after 27 million years ago caused the loss of those plant groups on the Ethiopian Plateau.
我们认为2700万年前之后某个时间旱季长度的增加导致了埃塞俄比亚高原上那些植物群落的消失。
Further analyses show the variation of earth rotation rate and sunspot cycle length have important role on the climate abrupt change in the Qinghai-Xizang Plateau.
进一步分析表明，地球自转速度和太阳黑子周期长度的变化对高原及北半球本世纪气候的突变和阶段性变化起着重要的作用。
Once you start hitting a plateau, take it to a new level by increasing intensity or length of time in some way.
一旦你开始达到瓶颈，就提高训练强度或者延长点锻炼时间。
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