... crater lake 火山口形成的深湖... jet crater 喷丝板沉积物... crater filler 焊口填充料 ...
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But there was no bomb crater, indicating the strike may have been carried out by a helicopter gunship, or that it had been strafed by a fighter jet.
但那里没有弹坑，说明可能是直升机火力造成的，也有可能是被战斗机低空扫射造成的。
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