Correct
备而不用
/ bèi ér bùyòng /
Strokes
Definition
have sth ready just in case/keep sth for possible future use
Example
Definition
have sth ready in case of need; save sth for possible future use; keep sth so as not to be caught unprepared
have sth ready in case of need; save sth for possible future use; keep sth so as not to be caught unprepared