Spacewalks
n. 太空漫步, 太空行走；航天舱外活动
🗣️ 情景例句
Nice day, isn't it?
天儿真不错，你说呢？
I am Chen Jianguo. I am from Shanghai, China.
我叫陈建国，来自中国上海。
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？