1
Vocab：A way of doing something
method cn. 方法，方式
Vocab：A subject or problem that people are thinking and talking about
issue cn. 问题
Vocab：Causing stress and worry
stressful adj. 有压力的
Vocab：A length of time
period n. 一段时间，时期；句号
Vocab：Unprotected, uncovered
exposed adj. 暴露的，无掩蔽的
How many minutes of exercise do astronauts need to do every day to maintain good health?
At least 90 mins
Vocab & Translate：External factors
condition cn. 条件；情况
外部因素
When sunlight shines on the spacecraft, how much can the temperature swing(v. 涨落)？
when the sun hits the spaceship, the temperatures can swing 500 degrees in the other direction
With no air and no air pressure,
a person can’t live for even （） minutes!
10
Vocab & Spelling：adv. 幸运地
fortunately
Why can spacesuits protect astronauts?
Spacesuits protect the body, and they also provide air and air pressure.
Vocab & Spelling：n. 辐射(能
radiation
Blank Filling & Translate：Conditions in space are very （） for humans.
hostile adj.恶劣的
Vocab & Translate：Something new and difficult which requires great effort and determination
challenge cn. 挑战
一些全新的、具有挑战性的事情，需要付出巨大的努力和坚定的决心。
Vocab & Spelling：n. 大气, 大气层
atmosphere
How do we call it when an astronaut outside the space station.
That’s called a “spacewalk”
What protects us from radiation?
The Earth’s atmosphere
Vocab：时差
jetlag n.
Vocab & Spelling：Without any doubt
definitely adv. 明确地, 一定地
How long is the cycle of day and night that astronauts experience in space?
On a spaceship, astronauts experience a sunrise or sunset every 45 minutes, making for a 90-minute day
Translate：昼夜节律
circadian rhythms
Vocab：博览会
exposition n.（正式）阐述，博览会
What causes astronauts to appear as if they are floating?
Zero gravity，the station is moving very fast,
Vocab：使同步
synchronize v.
What kind of environment is likely to cause astronauts to fall ill?
A closed habitat