Auditors themselves say they have toughened their standards and beefed up internal controls.

审计人员自己说，他们已经提高了自己的标准，加强了内部控制。

Months of walking barefoot had toughened his feet.

数月的赤脚行走已使他的双脚变得坚硬。

This set is of '. ' toughened '.

这是钢化玻璃的，不易碎。

I wanted something bolder and toughened up.

我想了一些大胆和增韧。

The situation toughened up in that country.

那个国家的形势更加恶化。

He toughened his muscles by doing exercises.

他通过锻炼使肌肉健壮。