常规: code of conduct, conventions, common practice, routine (medical procedure etc)...
拳头: fist, clenched fist, competitive (product)...
鼻涕: nasal mucus, snivel...
义务: duty, obligation, volunteer (work etc)...
浮力: buoyancy...
私自: private, personal, secretly, without explicit approval...
故障: malfunction, breakdown, defect, shortcoming, fault, failure, impediment, error, bug (in software)...
碰见: to run into, to meet (unexpectedly), to bump into...
宫: palace, temple, castration (as corporal punishment), first note in pentatonic scale...
台: typhoon...