1. 商船：mercerizing machine 丝光机 | merchant ship 商船 | merchant vessel 商船

2. 民用船：manual work 手工劳动 | merchant ship 民用船 | mercury n,水银

3. 商船,民用船：mensuration by parts==>分块求积法 | merchant ship==>商船,民用船 | mercury boiler==>水银锅炉,水银蒸煮器

4. 商船运输的非船舶事故的淹溺和沉没：商船事故引起的淹溺和沉没 Merchant ship | 商船运输的非船舶事故的淹溺和沉没 Merchant ship | 商船非船舶事故的船上事故,未引起淹溺和沉没 Merchant ship

1. a cargo ship

    e.g. they did much of their overseas trade in foreign bottoms

    Synonym: bottomfreightermerchantman