機宜

guidelines / what to do (under given circumstances)

surname Yi

proper / should / suitable / appropriate

(bound form) machine; mechanism / (bound form) aircraft / (bound form) an opportunity / (bound form) crucial point; pivot / (bound form) quick-witted; flexible / (bound form) organic

to sit and waste a good opportunity (idiom); to lose the chance

(idiom) to brief sb in person on the line of action to pursue; to advise face-to-face on how to deal with the present situation

to give direct instructions on the way to deal with a matter / to brief personally (idiom)