他摔倒时手臂上划了一道很深的伤口。
He got a deep ___gash on his arm when he fell down.
他不小心用刀在腿上划了一道很深的口子。
He accidentally ___gashed his leg with a knife.
他不小心在木板上划出了几道很深的刻痕。
He accidentally made several deep ___gashes on the wooden board.
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