关键 guānjiàn HSK5 crucial Origin Definitions Defs Strokes Stroke Words Sentences Sents 关键词 guānjiàncí keyword 关键性 guānjiànxìng crucial nature the quality or state of being critical or essential to the outcome or function of something.关键字 guānjiànzì keyword 关键绩效指标 guānjiànjìxiàozhǐbiāo KPI key performance indicator (KPI)