protrusion
柯林斯詞典
1. N-COUNT A protrusion is something that sticks out from something. 凸出物; 凸起部分[正式]
He grabbed at a protrusion of rock with his right hand. 他用右手抓住了一塊凸起的巖石。
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1. N-COUNT A protrusion is something that sticks out from something. 凸出物; 凸起部分[正式]
He grabbed at a protrusion of rock with his right hand. 他用右手抓住了一塊凸起的巖石。