A is as B as C

It's the comparison syntax, which means that A has an attribute B similar to C.

For example:

Mary is as high as Jane

Jane and Mary have similar height.

Or negation:

I'm not as fluent in Spanish as you

You speak Spanish certainly better than I.

See also Lenka's sound which contains a lot of metaphorical comparisons:

As sly as a fox, as strong as an ox
As fast as a hare, as brave as a bear
As free as a bird, as mean as a word
As quiet as a mouse, as big as a house

(Full lyric for example here)

A is as B as C

It's the comparison syntax, which means that A has an attribute B similar to C.

For example:

Mary is as tall as Jane

Jane and Mary have similar height.

Or negation:

I'm not as fluent in Spanish as you

You certainly speak Spanish better than I.

See also Lenka's song which contains a lot of metaphorical comparisons:

As sly as a fox, as strong as an ox
As fast as a hare, as brave as a bear
As free as a bird, as mean as a word
As quiet as a mouse, as big as a house

(Full lyric for example here)