Sobel
n. 索贝尔（品牌名, 一种边缘检测滤波器）
🗣️ 情景例句
The best man always keeps the rings.
男傧相总是保管戒指的。
All things are difficult before they are easy.
凡事都是先难后易。
I have a headache, and she has a stomachache.
我头疼，她胃疼。