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。

youdao

Only about half of Americans growing up in poverty complete high school, and those who do reach only an eighth-grade standard.

在贫民窟长大的美国人中只有约一半的人完成了高中学业，更有甚者只完成了八个年级的课程。

youdao

It has a very long neck to reach the tender leaves up high on a tree.

它有着非常非常长的脖子，这样它就能够够到高高的树上那柔软的叶片。

youdao

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

Without any landmass to impede them, these swells land along the Irish coast, resulting in waves that can reach up to 12m high.

BBC: Where Irish eyes are surfing

By 2020 the number of people over 65 will reach a historic high of 55 million, up from 20 million in 1970.

FORBES: Rethinking Old Age

Government forecasts suggest the final 2010 visitor number will reach an all-time high of 1.3 million, up from a record 1.01 million in 2009.

FORBES: The Chinese Tourists And Their Yuan Are Coming To Japan