Zd
n. 天顶距（zenith distance）；零色散（Zero Dispersion）
🗣️ 情景例句
Nothing's as refreshing as ice water on hot day!
在大热天没有什么像冰水那样提神。
The product gives you an edge over your competitors,I guess.
我认为你们的产品可以使你们胜过竞争对手。
Tom and I are going to have a holiday.
我和汤姆准备去度假。