英语语法分析

They know what backdating is?

他们知道什么是追溯么？

As employers came across other firms using backdating, they felt obliged to do so too.

由于用人单位发现其他企业回溯期权，他们觉得也得被迫应随。

Backdating itself is not illegal, though a lack of accurate disclosure of it may well be fraud.

虽然缺乏准确一些信息它可能就是欺诈行为，但是期权回溯本身是不违法的。