All of these classes sit on top of an existing parser.

所有这些类都位于现有解析器的顶部。

youdao

She allowed me to sit on top of her kitchen table as I partook of those privileges.

这些时候，她都允许我坐在餐桌上。

youdao

The engine will sit on top of various storage engines, including Oracle's Berkeley DB.

该引擎将位居各种存储引擎(包括Oracle的Berkeley DB)之上。

youdao

Both Motorola and HTC have developed proprietary user interfaces that sit on top of Android.

FORBES: Nokia: Should They Dump Symbian For Windows Phone 7?

The plates will sit on top of tables, enabling customers to immediately and seamlessly charge their new Nokia devices.

FORBES: Apple Fans Would Swoon for Nokia's Lumia 920 -- If it Were an iPhone

There are two groups of honey-combs that sit on top of each other.

NEWYORKER: The Climate Fixers