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★unload v. 卸（货）--unlock
load 装货 v.
★wooden adj. 木制的
★extremely adv. 非常，极其
---------extremely beautiful
比较： I am tired. I am extremely tired
★occur vt. 发生(正式的），回忆起
-----happen vi.
---What happened/occured ?
sth occur to sb 某人突然想起某件事
It occurs to sb to do sth/that...
---It suddenly occurred to one of the workers to open up the box.
happen 偶然发生的事情
It happened on a hot summer.
take place 有计划发生的事件
Great changes have taken place in our hometown.
occur 正式的用法
It occured to me that I didn't finish my homework last nignt.
