Zd
n. 天顶距（zenith distance）；零色散（Zero Dispersion）
🗣️ 情景例句
Can I count on you to help me?
我能仰仗你的协助吗？
We have agreed on all terms in the contract. Shall we sign it next week?
我们对合同各项条款全无异议，下周签合同如何？
Not only was the meal well below the usual standard, but Bessie seemed unable to walk steadily.
结果，不仅饭菜远不如平时做得好，而且贝西走起路来似乎东倒西歪。