they are too small.和lt's too small.有什么区别?

they are too small：它们太小了；是I's too small的复数形式

I's too small.：太小

例句：

1.If objects can fit into a toilet paper roll, they are too small for your baby.

如果物件能放入一个卫生纸卷内，这一物件对你的宝宝就是太小了。

2.I can't get into the shoes. They are too small.

这鞋太小，我穿不进去。

3.i can't see the signs clearly . they are too small . would you mind giving meanother one with big signs?

我看不清这个标志，他们太小了，你介意给我换另一个标志大些的吗？