roll off the tongue：脫口而出。
Which English expression rolls right off of your tongue?
哪個英語表達是你能脫口而出的？
The names roll off his tongue like
motorways.
這些名字他都能像高速公路一樣脫口而出。
motorway：(英國)高速公路。
it doesn't quite roll off the tongue.
這話可不是那麼容易說出口的。
It's not a name that exactly rolls off the
tongue, is it?
這不是一個可以脫口而出的名字，對吧?