书籍 Four Corners 3 - 第四单元 课程D

someone who is trained to travel and work in space

all the people who work on a ship, aircraft, etc.

happening in or between more than one country

a large structure used as a long-term base for people to stay in space and conduct research

a vehicle designed and used to go to space and return multiple times

to teach a specific skill or a type of behavior to a person or an animal through a combination of instruction and practice over a period of time

to move or travel through the air

something such as a hammer, saw, etc. that is held in the hand and used for a specific job

to make or design something that did not exist before

different or better than what is normal

a big round mass covered in land and water, on which we all live

a thin tube made of plastic, glass, etc. for sucking drinks

to be in motion on a body of water or current of air at a slow pace

used to give permission or express agreement

to achieve something after dealing with the difficulties

to think about something carefully before making a decision or forming an opinion

the event or process of a baby being born

either of two children born at the same time to the same mother