Decahedrons
n. [數] 十面體
??? 情景例句
Don't forget to take lots of pictures.
別忘了照些照片。
There's no such thing as a free lunch.
天下沒有白吃的午餐。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固體障礙物越遠。回聲返回所用時間就越長。