Alka
n. (Alka)人名；(德、塞)阿尔卡\\n碱度
🗣️ 情景例句
Well, then, perhaps we can get together another time.
也许我们可以另找时间聚一聚。
The plumber has made a mistake.
配管工犯了一个错误。
It is the natural frequency of emission of the hydrogen atoms in space and was discovered by us in 1951;
这个频率是空间氢原子释放的自然频率，是在1951年被人类发现的。