Schlieren
条纹照相, 暗线照相, 纹景法, 纹影法
🗣️ 情景例句
Good morning. Restaurant Service. May I help you?
早上好，餐厅服务部，能为你效劳吗？
A proper amount of exercise contributes to good health.
适度的运动有益于健康。
What's up?
有什么事吗？