used when we want to talk about a person or thing for the first time or when other people may not know who or what they are

一个, 一

a series of connected carriages that travel on a railroad, often pulled by a locomotive

火车, 车厢

to let someone use one's property, car, etc. for a particular time in exchange for payment

出租

a place with a few rooms in which people live, normally part of a building with other such places on each floor

公寓, 单元

a place where important cultural, artistic, historical, or scientific objects are kept and shown to the public

博物馆

something that we usually buy and bring back for other people from a place that we have visited on vacation

纪念品, 手信

to see and talk to someone for the first time, typically when getting introduced or becoming acquainted

见面, 相识

