Do you have firsthand knowledge that the Earth is round (a sphere)?

你真的有第一手信息来说明地球是圆的(或一个球体)吗？

youdao

You now need to gather more in-depth information. Your best source of this information are people who have firsthand knowledge of the occupations in which you are interested.

你需要收集更进一步的信息，而你的信息源最好就是在这方面有工作经验的前辈了。

youdao

You now need to gather more in-depth information. Your best source of this information are people who have firsthand knowledge of the occupations in which you are interested.

你需要收集更进一步的信息，而你的信息源最好就是在这方面有工作经验的前辈了。

youdao