French education ministers have perfected the art of lengthy consultation .

法国教育部长已对完善艺术科目进行了了冗长的协商。

But this form of recycling is an expensive and technically difficult process that is still being perfected .

但是这种回收的形式是种成本昂贵和技术艰难的过程，仍需不断的完善。

Once you have perfected your email cover letter , use it as a template for future emails .

一旦你完善好自己的求职邮件，你就可以用它作为未来电子邮件的模板。

Since the turn of the millennium engineers have perfected the art of drilling horizontally through hard shale .

新千年伊始，工程师们就已经完善了水平钻透坚硬页岩的技术。

Paniccia 's team has perfected tiny silicon chips capable of encoding and decoding laser signals sent via fiber optics .

paniccia的团队完善了这种小型硅晶集成电路，它们可以对光纤传输的信号进行编码和解码。