Sideliner
n. 不参与活动的人, 置身于活动之外的人; 局外人；旁观者
🗣️ 情景例句
I'm not sure. I'll have to check.
我不能确定，我必须查一下。
Why are you running away from me?
你为什么离开我？
He turned on the light, but he couldn't see anyone. The thieves had already gone.
他开了灯，但不见一个人。小偷逃走了。