介绍:
They're exactly alike. 他们一模一样
They're (exactly) the same.他们完全一样
They're (perfectly) identical. 他们完全相同
A is just/exactly like B. A和B 完全一样
如果两者很相似，（但是不相同），我们可以用下面的表达：
They're about the same.他们几乎相同
They're (very) similar. 他们非常相似
A is like B. A像B
A is similar to B. A和B相似
A resembles B. A看起来像B
They both... [+ verb] 他们都…
A is just as [adjective] as B. A像B一样…
