习惯用语trench on [upon]1.侵占[犯], 接近, 近似特殊用法cabletrench1.电缆沟contour trench [ridge, furrow]1.水平沟, 等高沟cross trench1.横沟cutoff trench1.防渗隔离槽deep-sea trench1.【地质】深海沟discovering trench1.试沟drainage trench1.排水沟foundation trench1.基坑, 基槽longitudinal trench1.纵向泄水沟(碴床)open trench1.明沟pilot trench1.导沟Romanche trench1.【地质】罗曼希海沟shelter trench1.散兵壕step trench1.探沟submarine trench1.【地质】海底沟