to let someone leave a place in which they have been confined or stuck

释放, 放出
(of animals) to have sex for breeding or reproduction

交配, 繁殖
the thin sheets on which one can write, draw, or print things, also used as wrapping material

纸, 纸张
the distance below the top surface of something

深度, 深度值
information or evidence that proves the truth or existence of something

证据, 证明
having been made certain, firm, or approved by a formal ceremony

经过确认的, 正式确认的
someone on whom scientific experiments are tested

小白鼠, 实验对象
any vital part of the body which has a particular function

器官, 脏器
the child or children of a particular person or animal

幼崽, 后代
a protective system in the body that defends it against diseases and harmful substances

免疫系统, 免疫机制
(genetics) a basic unit of heredity and a sequence of nucleotides in DNA that is located on a chromosome in a cell and controls a particular quality

基因, 遗传因子
the details about someone’s family, experience, education, etc.

背景, 底蕴
a piece of information discovered as a result of a research

发现, 研究结果
a road vehicle that has four wheels, an engine, and a small number of seats for people

汽车, 轿车
the things we wear to cover our body, such as pants, shirts, and jackets

衣服, 服装
the process that involves teaching and learning, particularly at a school, university, or college

教育, 教书育人
people that are related to each other by blood or marriage, normally made up of a father, mother, and their children

家庭, 家人
the work that we do regularly to earn money

工作, 职位
the general appearance of a person's face or body

外表, 样子
something that we use to buy and sell goods and services, can be in the form of coins or paper bills

钱, 货币
all the qualities that shape a person's character and make them different from others

个性, 性格
a feature or quality of something

特性, 属性
one's ability to say funny things or be amused by jokes and other things meant to make one laugh
to recognize or become aware of a particular scent

嗅, 闻
to make our mouth curve upwards, often in a way that our teeth can be seen, to show that we are happy or amused

微笑, 笑
a group of individuals who share similar economic, cultural, and educational status

社会阶层, 社群阶级
