instant

The company's new mobile app was an instant success, gaining millions of users in the first week.

(Chinese) 该公司的新手机应用取得了立竿见影的成功，在第一周就获得了数百万用户。

He poured boiling water into the bowl to prepare some instant noodles for a quick late-night snack.

(Chinese) 他往碗里倒进沸水，准备了一份速食面作为快速的深夜宵夜。