难关 nánguān HSK7 crisis Definitions Defs Origin Strokes Stroke Words Sentences Sents 1 sentence 有时他们担心到他们发现很难“关掉”和放松的地步。 yǒushí tāmen dān xīn dào tāmen fāxiàn hěn nán“ guān diào” hé fàngsōng de dìbù. Sometimes they worry to the point that they find it very hard to switch off and relax. Source: CCMatrix