rock sill 中文意思是什麼

rock sill 解釋
拋石潛壩
  • rock : n 1 巖，巖石，磐石，巖壁；卵石；〈常 pl 〉〈美口〉石子兒；暗礁，巖礁。2 〈the R 〉直布羅陀 （Gibr...
  • sill : n. 1. 【建築】基石，基本；踏板；楣，門檻，窗臺。2. 【地質學；地理學】巖床，巖層，海底山脊；平巷底，礦山巷道的底面；底粱。3. 【機械工程】（車體底框的）梁。
  1. Chunks of the overlying rock may break off and become a part of a sill.

    上復巖石的碎塊可能破裂並成為巖床的一部分。
  2. Injun joe s bowie - knife lay close by, its blade broken in two. the great foundation - beam of the door had been chipped and hacked through, with tedious labor ; useless labor, too, it was, for the native rock formed a sill outside it, and upon that stubborn material the knife had wrought no effect ; the only damage done was to the knife itself

    他死前拚命用刀砍過那門下面的大橫木，鑿穿了個缺口，可是這沒有用，外面的石頭天然地形成了一個門框，用刀砍這樣堅固的門框，簡直是雞蛋碰石頭，根本不起作用，相反刀倒被砍得不成形了。
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