중이니까

because ... is in progress

→ 중
phrase Rare #27,556
because ... is in progress Used after an activity or situation to explain that it is currently underway.
KO: 회의 중이니까 나중에 전화해 주세요.
EN: I’m in a meeting, so please call later.

전쟁 중 이니까

Because we're at war.

— 거울 (1975)

현재 연락 중 이니까 잠시만 기다리세요

I’m contacting them now, so please wait a moment.

— Virgin Stripped Bare by Her Bachelors (2000)

촬영 중 이니까 비켜 가 주세요

We're filming, so please step aside.

— 라라랜드 (2016)