如果我们想要在年老时保持身体健康，我们的科技就必须领先全世界。

If we want to be healthy as we age, we have to be the leading scientific country in the world.

youdao

如果我们想要在年老时保持身体健康，我们的科技就必须领先全世界。

If we want to be healthy as we age, we have to be the leading scientific country in the world.

youdao