Tacan
n. [空]塔康( 一种战术空中导航系统)
🗣️ 情景例句
I would be happy to show you around.
我很乐意带你到四周看看。
In university, students are trained to become teachers and engineers.
大学的学生被训练成为教师和工程师。
So the number of stars that we know exist is now estimated at about 300 million million million.
因此，我们所知道的现有恒星数目估计约有30亿×1000亿颗。