n.旁观者，目击者，观众（等于spectator）
An impartial onlooker must be sought out.
须问旁观冷眼人.
One onlooker had to be restrained by police.
一个旁观者遭到了警察的制止。
I am still an onlooker and my position is privileged.
我仍然是个旁观者,我处于享有特殊权利的位置.
汉字吧hanzi8.com