与每年的流感疫苗不同的是，这种新疫苗提前上市了。

The new vaccine, which is different from the annual flu vaccine, is available ahead of expectations.

youdao

与每年的流感疫苗不同的是，这种新疫苗提前上市了。

The new vaccine, which is different from the annual flu vaccine, is available ahead of expectations.

youdao