VOA慢速英语:What It Takes to Be an Astronaut

短语讲解：

1. “It starts by us reviewing all of the files to make sure they meet the basic qualifications, and then we actually utilize our current team of astronauts to come in and review the files as well."

make sure 把事情弄清楚，核实或查明某事物
例句：Make sure the passengers are strapped in(to their seats) before driving off.
开车前请乘客务必系好安全带。

2. They also need at least three years of experience in a similar field or at least 1,000 hours as a jet airline pilot.

at least 至少
例句：In fact it requires at least n generators.
事实上，它至少要有n个元素。

3. What kinds of personality qualities is NASA looking for in an astronaut?

look for 寻找（某人或某物）
例句：I want Bill to look for Mr. Jones to talk.
我要比尔找琼斯先生谈一谈。

4. This is the group that may fly on as many as three new spacecraft still being developed.

as many as 和…一样多; 不下于
例句：They drew as many as four times that year.
他们那一年四次打成平局。