Echinacosid
海胆苷
🗣️ 情景例句
He's busy preparing for class.
他忙着准备功课。
No man knows when he shall die, although he knows he must die.
纵然知其难免一死，人却难料何时身亡。
There's a bar next door to the station.
车站旁有一个酒吧。