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Signal
1）n. 信号
我们住的离城里太远, 不能收到清晰的电视图像。
We live too far from the city to get a strong television signal.
2）V. 发信号
他作手势要侍者拿菜单来。
He signaled the waiter to bring the menu.
Stamp
v. 跺，踩
他踩熄香烟
He stamped out the cigarette.
n.邮票，章
自从他八岁的时候就已经集邮了。He has been collecting stamps since he was eight.
None is genuine without our stamp.未盖我们的戳记的都不是真货。
helicopter n. 直升飞机
可以表示飞机的词语
plane ;airplane; aero-plane; aircraft
用直升机把他送到了医院。He was sent to the hospital by helicopter.
