知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 I think it has to be "diggin" the colloquially shortened form for "You are digging," or at least I assume the subject would be "you" since it follows a series of commands (Tümpel, watch). Let's take your example:One-on-one instruction is always a lesson, never a class: https://devinvncqc.59bloggers.com/34213733/flight-optionen