跑题

to digress / to stray from the topic

(of an animal) to paw (the ground)

to run / to run away / to escape / to run around (on errands etc) / (of a gas or liquid) to leak or evaporate / (verb complement) away / off

surname Ti

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