He will secure that there will be no difficulty.

他将保证不再出现难。

She showed a touching faith in my ability to resolve any and every difficulty.

她相信我有能力解决难，这令人感动。

No difficulty could awe these young men.

难都吓不倒这年轻人。

He was willing to face any hardship in fulfillment of his duty.

他愿意难去履行他的职责。