1.rare 稀有的
It's extremely rare for it to be this hot in April.
四月份就这样炎热是极其罕见的

2.disassemble 拆开
We had to completely disassemble the engine to find the problem.
我们只好把发动机全部拆开以寻找故障原因。

3.excavate 挖掘
The site has been excavated by archaeologists.
这个遗址已被考古学家发掘出来。