实用: practical, functional, pragmatic, applied (science)...
赶: to overtake, to catch up with, to hurry, to rush, to try to catch (the bus etc), to drive (cattle etc) forward, to drive (sb) away, to avail oneself of (an opportunity), until...
隐身: to hide oneself, invisible (person or online status)...
镇定: calm, unperturbed, cool...
届: to arrive at (place or time), period, to become due, classifier for events, meetings, elections, sporting fixtures, years (of graduation)...
合理: rational, reasonable, fair...
愣: to look distracted, to stare blankly, distracted, blank, (coll.) unexpectedly, rash, rashly...
补救: to remedy...
打发: to dispatch sb to do sth, to make sb leave, to pass (the time), (old) to make arrangements, (old) to bestow (alms etc)...
憋: to choke, to stifle, to restrain, to hold back, to hold in (urine), to hold (one's breath)...