a large passenger ship on a regular route

• a large passenger airplane operating scheduled flights

定期航线的大型客轮

• 执行定期航班的大型客机

a removable inner layer or cover that lines and protects

• e.g., trash can bag, jacket lining, glove or shoe liner, pantyliner

可拆卸的内衬或内层，用于衬垫和保护

• 例如 垃圾桶衬袋 夹克内衬 鞋垫 护垫

a replaceable metal sleeve inside an engine cylinder

发动机缸体内的可更换缸套

the printed insert included in a record, tape, or disc package

唱片、磁带或光盘包装内附的说明书或内页

baseball: a ball hit hard on a straight line

棒球：平直有力的击球

informal: short for eyeliner, a cosmetic for lining eyelids

口语：眼线产品的简称

to fit an engine cylinder with a liner

给发动机气缸安装缸套

astrophysics: low-ionization nuclear emission-line region (acronym LINER)

天体物理：低电离发射线区域（LINER，星系核附近）