Valida
n. 有效霉素
🗣️ 情景例句
He is burning the midnight oil.
他在挑灯夜读。
There is a crook(=affliction,trial) in the lot of every one.
人生总有倒楣事；人生总有不如意处。
Oh! Is that a ball? Aren't all balls round?
噢，那是个球吗？难道所有的球不都是圆的吗？