窗台(板)( sill的复数形式 ); 门槛; 侵入火成岩席; 平巷底
窗台(板)( sill的复数形式 ); 门槛; 侵入火成岩席; 平巷底
n. United States operatic soprano (born in 1929)；n. structural member consisting of a continuous horizontal timber forming the lowest member of a framework or supporting structure；n. (geology) a flat (usually horizontal) mass of igneous rock between two layers of older sedimentary rock
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