But mission engineers found themselves facing a challenge that they'd never faced before on Earth.
但任务工程师发现自己面临着 这是他们在地球上从未遇到过的挑战。
单词 | mission engineer |
例句 |
原声例句
Crash Course Physics 速成课物理 But mission engineers found themselves facing a challenge that they'd never faced before on Earth. 但任务工程师发现自己面临着 这是他们在地球上从未遇到过的挑战。 |
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