介词to 可以用来表示比较，意为“比......，比较......，与......相比”，不是but 之意。例如：

Teachers are often compared to burning candles.

人们总是把老师比喻为燃烧的蜡烛。

The score is three to two.

比分是3比2。

be second to  与......相比次于:

The population of India is second to that of China.

相比之下，印度的人口仅次于中国。

be inferior to  与......相比劣于:

I consider this one to be inferior to that one.

我认为这个比那个要差。

be superior to  与......相比优于:

His composition is far superior to mine. 

他的作文比我的好多了。

be junior to  比......年幼；比......职位低:

The president was so young that he was junior to some of his employees. 

总裁的年龄甚至是比他的一些雇员还小。

be senior to  比......年长；比......职位高：

He is senior to me, though he is younger. 

他地位比我高，虽然他比我年轻。

be prior to  与...相比先于：

This task is prior to all others. 

这项任务比所有其他任务都重要。

be similar to  与...相似：

His dress is very similar to mine in colour. 

在颜色上相比，他的衣服和我的衣服相比很相似。

be identical to 与...相比一致：

Your appearance is identical to hers. 

你的相貌和她相比一模一样。