Come in
1.以某种形式（颜色，尺寸）销售或生产
Poodles come in 3 different sizes: toy, mini, and standard.贵宾狗有3种尺寸：玩具型、迷你型、标准型。
The cake comes in chocolate, vanilla, and mango.这款蛋糕有3钟种口味：巧克力、香草、芒果。
2.承担角色或起到作用
结构：where + noun + come in
We're going to need someone to help with the cooking, and that's where you come in.我们需要找个人来烧饭, 就你来帮忙烧吧。
You can’t learn a subject all on your own, and that’s where your textbooks and teachers come in.你不可能完全靠自己来学所有课程。这个时候就需要课本和老师了。
Betty: We need to buy a stroller for the baby. What do you think of this one?我们需要买一个婴儿推车。你觉得这个如何?
Sam: It seems like a good choice because it comes in a variety of colors and patterns.看上去不错, 颜色和图案的选择很多。
Betty: It also comes in different materials.而且还有很多不同材质的款式。
Sam: Ok let’s get it. It’s really big though, how are we going to get it home?行,就买吧。但是它很大, 我们怎么拿回家呀?
Betty: Well, I’m 8 months along. I can’t help carry it. So I guess this is where you come in!我已经8个月了。我不可能帮忙拎。所以这个时候就靠你了。
Men come in a variety of shapes and sizes. I personally like the chubby ones.男人的体型有很多种。我个人喜欢胖胖的。
英语君Sam短语分级（口语）：
日常需熟练且高频地使用。
同五颗星，频率稍低一些。
日常偶尔使用，可用于替换同义高频短语。
可以不用，但是一定要听懂。注意：这类词语可能是写作中的大词，如果写作有需要，必须记忆。
