2142 drill

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今天我们要学的词是 drill. Drill 演习。Fire drill 火灾演练。Military drill 军事演习。Millions of people in California participated in an earthquake drill last week. 美国加州上星期有成百上千万人参加了地震演练。埃博拉病毒在美国本土的出现，让很多医院都进入备战状态。Some hospitals have had emergency drills to make sure they know what to do if an Ebola patient shows up at the door. 一些医院进行紧急演练，确保埃博拉患者一旦出现，立即启动必要程序。好的，今天我们学习的词是 drill, drill, drill...

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2141 handheld (14/10/22)
2140 do-it-yourself (14/10/17)
2139 estimate (14/10/17)
2138 rampant (14/10/16)
2137 revoke (14/10/16)
2136 monitor (14/10/15)
2135 cancellation (14/10/10)
2134 encourage (14/10/10)
2133 breach (14/10/9)
2132 underestimate (14/10/9)