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1、launch
发射（火箭、导弹或卫星）
NASA plans to launch a satellite to study cosmic rays.
美国国家航空航天局计划发射一颗卫星上天，对宇宙射线进行研究。
A Delta II rocket was launched from Cape Canaveral early this morning.
今天一早，一枚“德尔塔”Ⅱ型火箭在卡纳维拉尔角发射升空。
开展（重大活动）；发起，发动（军事袭击等）
Heavy fighting has been going on after the guerrillas had launched their offensive.
游击队发起攻击后，激烈的战斗一直持续不断。
The police have launched an investigation into the incident.
警方已对该事件展开调查。
（在江河、湖泊和港口载人的）大型汽艇
The captain was on the deck of the launch, steadying the boat for the pilot.
船长站在汽艇甲板上为领航员保向。
We'll make a trip by launch to White Island.
我们将乘汽艇到怀特岛。
2、come down
(成本、水平或数量)下降，降低
Interest rates should come down.
利率应该降低。
If you buy three bottles, the bottle price comes down to 2.42 pound.
如果买3瓶，价格会便宜一些，每瓶2.42英镑。
落下;降落
The cold rain came down.
下起了冰冷的雨。
The curtain came down after the first act.
第一幕过后，幕布落了下来。
