icebreaker 破冰船
  launch 艇
  lifeboat 救生艇
  lighter 驳船
  liner, ocean liner 远洋班轮
  merchant ship, merchantman 商船
  motorboat 摩托艇
  outboard 尾部装有马达的小艇
  paddle steamer, paddle boat 明轮船
  passenger boat 客船