Zd
n. 天顶距（zenith distance）；零色散（Zero Dispersion）
🗣️ 情景例句
I'll try to squeeze you at 2:30 p.m.
你来如何？我会在下午2点半挤出时间的。
I can't say for certain off-hand.
我还不能马上说定。
'And how can you explain that?' she asked.
“那么你对那又作何解释呢？”她问。