1.belong to 属于；是（某团体、国家等）的成员；属于（某时期）；归于
While the two are only days apart in age they seem to belong to wholly different generations.
尽管这两人年龄上只相差几天，他们却好像是属于完全不同时代的人FF0Hg5vukejN6kY。

2.excavate v. 挖掘；发掘；开凿；挖出
A contractor was hired to drain the reservoir and to excavate soil from one area for replacement with clay.
雇了一个承包商抽干水库的水，挖掉一个区域的泥土后再用黏土填上dy92j40Z0Y@J#。

3.obscure a. 无名的；鲜为人知的
The hymn was written by an obscure Greek composer for the 1896 Athens Olympics.
这首赞歌是希腊一位名不见经传的作曲家为1896年的雅典奥运会创作的1pMa*#eidz。