Zd
n. 天顶距（zenith distance）；零色散（Zero Dispersion）
🗣️ 情景例句
Governments wage a constant war against counterfeiting.
政府掀起持久的打假活动。
This kind of article is often bought as a gift, so exquisite and tasteful design is of prime importance.
人们购买这种商品通常用来赠亲友，所以精美高雅的设计至关重要。
And Chen Wei was sure he could see a snake in the grass. I remember.
陈伟还肯定他看到草里有一条蛇。我记得呢。