Newly confirmed tests show two people with coronavirus died near San Francisco in February.

最新证实的检测显示，今年2月，在旧金山附近有两人死亡。

We confirmed the tests. It's a perfect match.

我们已经做了化验 非常符合。

Only the U.S., Russia, the U.K., France, and China have carried out confirmed tests of hydrogen bombs.

只有美国、俄罗斯、英国、法国和中国进行了氢弹试验。