北半球正在发生猪流感的第二波大流行。

The second wave of the swine flu pandemic is now under way in the northern hemisphere.

youdao

根据以往的经验，应预计到在一年之内会出现第二波全球传播。

Based on past experience, a second wave of global spread should be anticipated within a year.

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困扰重症护理师的是，当第二波病毒来袭时医院能否腾出足够多的床位。

What haunts ICU doctors now is whether they will have enough beds for the coming second wave.

youdao

The second, the abolition of the family, and the third wave being the establishment of the philosopher kings.

第二波，不要家庭；,第三波,设立哲学家国王。

耶鲁公开课 - 政治哲学导论课程节选

This is in a state that barely extends beyond Brandenburg and Pomerania in what now is Western Poland, and still Prussia in the unified Germany.

当时的普鲁士基本上就是勃兰登堡和波美拉尼亚,在德意志第二帝国时期仍保留普鲁士王国的建制,历史上的波美拉尼亚现位于波兰西部

耶鲁公开课 - 欧洲文明课程节选

Then you get successively deeper, II through IV, slow, irregular, high amplitude delta waves, and then once you reach stage IV you start going up again, up through stage III and II.

然后睡得越来越深，从第二到第四阶段，慢，不规则，高振幅的δ波，等你到达第四阶段，你又开始返回，第三阶段和第二阶段。

耶鲁公开课 - 心理学导论课程节选