| 释义 |
DEFINITIVE EXAMPLES 权威例句〔Proterozoic〕Of, belonging to, or being the later of two divisions of Precambrian time, during which sponges, sea worms, and other forms of sea life appeared.原生代的，元古代的：前寒武纪两个时期中的后一个时期的，属于这个时期的，在这个时期的在这个时期海绵、海洋蠕虫和其它形式的海洋生命出现美国传统〔gear〕During this period, Japan's export industries were in top gear (=were as active as they could be) .在这个时期，日本的出口产业突飞猛进。朗文当代 |