This is a matter of no account.

这是一件无关紧事。

He often dissipated his energies in trivial matters.

他常在无关紧事上浪费精力。

That’s something extrinsic to the subject.

那是对本题无关紧。

We have an urgent thing.

我们有一件紧事情。

It is a mere trifle.

那只是无关紧琐事而已。

She was always threatening to leave him, but when it came to the crunch she didn’t have the courage.

她总是威胁说离开他，可是一到紧关头却又有勇气了。

But Wakefield used his trademark knuckleball to set up a sneaky fastball, ducking and weaving the New York bats in tight spots.

但伟克飞尔用他蝴蝶球搭配著诡异直球，屡次在紧关头解决洋基打者。

He’s at a crossroads in his career—either he stays in his current job and waits for promotion, or he accepts this new post in Brazil.

他事业正处在紧关头，么继续干目前工作，职，么就接受巴西新工作。

Besides the noble art of getting things done, there is a nobler art of leaving things undone. The wisdom of life consists in the elimination of nonessentials.

除了有高贵艺术将事做好以外，还有高贵艺术不将事做完成。生命智慧包含将不紧事消除。

By becoming involved with tangential issues, it hopes to hide the real question and keep it out of mind.The ego's characteristic busyness with nonessentials is for precisely that purpose.

它之所以老在无关紧问题上搅和，乃是希望借此避开真正问题，将它驱逐于心灵之外。

These case studies show that s mall subject vocabularies are useful for these community-oriented services, and that maintenance is a crucial issue for the development and use of the vocabular ies.

从这两个案例可以 看出型主题词表对专业服务是非常有用，并且维护工作对词表建立和应用是至关紧。