Trihedrons
(trihedron 的复数) n. 三面体
🗣️ 情景例句
I know they are.
我知道他们会。
I asked him to leave immediately, but he wouldn't.
我请他马上离开，但是他不肯。
Walking up and down the stairs would beat any exercise machine.
上下楼梯可比什么健身器都要好。