Nld
abbr. 鼻泪管（nasolacrimal duct）
🗣️ 情景例句
Hello, Miss Huang. How are you?
喂，黄小姐，你好吗？
Ouch, that hurts!
哎呦，好痛呀！
a wave length (the horizontal distance between two wave crests),
波长（两个浪峰间的水平距离）