Considerable modification of the existing system is needed.

需要对现有的系统进行相当大的改进。

《牛津词典》

We'll need to decide whether or not to improve the existing system or to build a completely new system.

我们需要决定是改进现有的系统还是建立一个全新的系统。

youdao

This is far simpler than the existing system.

这远比现有的系统简单。

youdao

Treasury Secretary Tim Geithner says the financial crisis developed in part because the existing system let some companies "shop for the weakest regulator."

VOA: special.2009.06.19

He said controlling personal information will be simpler than with the existing system of complex privacy settings.

VOA: special.2010.05.28

Most of it,he says, could be paid for by reducing waste in the existing health care system.

VOA: special.2009.09.12

Other options cover a reduced number or more streamlined version of the existing system.

BBC: Break up police forces says study

Under the existing system, patients or their families are expected to follow set procedures.

BBC: How the NHS deals with complaints

In any case, Megawati has said she will continue to work within the existing system.

CNN: HARD CHOICES