Tetraphosphate
四磷酸盐
🗣️ 情景例句
I'm happy to meet you.
很高兴见到你。
Won't you be embarrassed to leave the party early?
你提早一点离开宴会也无妨吧？
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）