Schlieren
条纹照相, 暗线照相, 纹景法, 纹影法
🗣️ 情景例句
The Thanksgiving Day parade is always such great fun.
感恩节的游行总是如此有趣。
Opportunity seldom knocks twice.
机不可失，失不再来。
I don't want a mink coat!I want to see the world.
我不要貂皮大衣。我要去见风世面。