口子: hole, opening, cut, gap, gash, my husband or wife, classifier for people (used for indicating the number of people in a family etc), precedent...
填空: to fill a job vacancy, to fill in a blank (e.g. on questionnaire or exam paper)...
后人: later generation...
跨: to step across, to stride over, to straddle, to span...
结尾: ending, coda, to wind up...
迟到: to arrive late...
恩人: a benefactor, a person who has significantly helped sb else...
浏览: to skim over, to browse...
优胜劣汰: survival of the fittest (idiom)...
勘探: to explore, to survey, to prospect (for oil etc), prospecting...
