Phosphorane
正膦
🗣️ 情景例句
I'm ready, Grandpa. You name the day.
我准备好啦 ，爷爷。哪一天随你挑吧。
Is the production line fully attomatic?
生产线是全自动的吗？
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）