Radia symmetry
[医] 辐射对称
🧩 词语组成解析
[法] 反箕形纹
🗣️ 情景例句
Everything is shaping up well.
一切进展顺利。
She failed to call the office to cancel her appointment.
她没能打电话给办公室取消她的约会。
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？