口语重点

third wheel 表示碍事的轮子， 多余的轮子， 引申为“电灯泡”

Just go ahead with your boyfriend. I don't wanna be the third wheel.

你和你男朋友先走， 我可不想当电灯泡。

What? You watched the movie with the lovers?You were being a third wheel.

什么？ 你跟一对情侣看的电影？ 你在当电灯泡呀。

I won't accept the invitation to spend the holiday with you two cause being a third wheel is so weird.

我不想接受要求跟你们小两口去度假，因为当电灯泡怪怪的。