合适: suitable, fitting, appropriate...
社会: society...
提出: to raise (an issue), to propose, to put forward, to suggest, to post (on a website), to withdraw (cash)...
跑龙套: to play a small role...
转眼: in a flash, in the blink of an eye, to glance...
急迫: urgent, pressing, imperative...
稠密: dense...
丙: bing ［third of the Heavenly Stems（天干）］，third...
响声: noise...
畔: edge, side, boundary, bank (of a river etc), shore...
