bystander

n person standingnear, but not taking part, when sth happens; onlooker 旁观者: an innocent bystander 无辜的旁观者 * Police interviewed several bystanders after the accident. 事故发生後, 警方接见了几个现场旁观者.

by the way, by turns, by virtue of, by way of, by worthy of, by yourself, by-election, by-law, by-play, by-product, by-road, bye, bye-bye, bye-byes, bygone, bygones, byline, bypass, byproduct, Byron, byte, byway, byword, C, C and W, C of E, C, c, C-in-C, c., C. and F., c/o, c/s, CAA, cab, cab-driver, cabal, cabaret, cabbage, cabby (also cabbie), caber,