- hang-up (about something)
an emotional problem about something that makes you embarrassed or worried 苦恼；难堪；焦虑 - (North American English)
a problem that delays something being agreed or achieved （拖延协议等达成的）难题，障碍 The ABM treaty is a key hang-up in negotiations. 《反弹道导弹条约》是谈判中的主要障碍。