先决问题

preliminary question / priority problem / issues requiring more immediate attention

early / prior / former / in advance / first

prerequisite / precondition

to decide / to determine / to execute (sb) / (of a dam etc) to breach or burst / definitely / certainly

to ask / to inquire

to ask; to inquire

question / problem / issue / topic / CL:個|个[ge4]

surname Ti

topic / problem for discussion / exam question / subject / to inscribe / to mention / CL:個|个[ge4],道[dao4]