英语翻译Not only is "Chichen Itza" a bit of mouthful-even more of a mouthful than a pizza,you might say.

不仅是“奇琴伊察”，一口一口，甚至超过比萨饼位，你可能会说。

not only 置于句首的句子倒装
奇琴伊察（地名：墨西哥奇琴伊察玛雅城邦遗址曾是 古玛雅帝国最大最繁华的城邦）不仅仅是只有一口那么大，甚至比一块披萨饼还大，你或许会这样说。

Not only is "Chichen Itza" a bit of mouthful （正常语序为： "Chichen Itza" a bit of mouthful is a bit of mouthful ）
----even more of a mouthful than a pizza,you might say.（破折号后面起递进解释的作用，承前省略了主语和谓语 "Chichen Itza" is）

你会说"Chichen Itza"不止有些拗口,甚至比pizza还难读.
这是个倒装句,正常语序为"Chichen Itza" is Not only a bit of mouthful-even more of a mouthful than a pizza,you might say.
mouthful是名词,意思是“长而拗口的词；难读的词组”
后面是省略句(it is) even more of a mouthful than a pizza

crazy

you might say
Not only is "Chichen Itza" a bit of mouthful-
even more of a mouthful than a pizza