在线词典

分类:语言工具
在线词典,是一款在线使用的中英文查词词典。本工具支持查询英文和中文单词及词组的含义,查询效率高、结果丰富,包括单词变体、常用短语、英英释义、同义词、同根词、词语辨析等,是外语学习者必备的在线查词工具。

The Cambrian Geological Period


网络释义
寒武纪地质时期
The fossils give scientists their first glimpse of the strange creatures that populated the seas in the early stage of what is known as the Cambrian explosion. The Cambrian geological period, from 570 million to 500 million years ago, saw the appearance of increasingly complex marine animals in a riot of shapes and anatomical designs anticipating much of life as it is today.
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