But, we "ve never lost an astronaut in flight. We" ve never had a tragedy like this.

然而我们从未在飞行中丧失过宇航员，从未经历过这样的灾难。

youdao

But, we "ve never lost an astronaut in flight. We" ve never had a tragedy like this.

然而我们从未在飞行中丧失过宇航员，从未经历过这样的灾难。

youdao