It is art in it's most transitory form. It is gone within an instant, and therefore, extremely precious.

它是最短暂的艺术形态，瞬间就会消失，因此，万分珍贵！

youdao

I truly understand the unpredictability of life, which often changes within an instant without being noticed.

我强烈地认识到生命的无常，在不经意的瞬间就会改变！

youdao

The seneschal noted that none of the others stirred the solemnity of the challenge and, for an instant, the sanctity that had for so long loomed within the chapel seemed tainted.

总管看到其他人没有搅乱反对的严肃，这一刻笼罩在礼拜堂上空的圣洁似乎被玷污了。

youdao

It prompted Villas-Boas into making a change with Nicolas Anelka coming on to replace Frank Lampard - a switch that had an instant impact as the Frenchman played in Torres within a minute of the restart for the sort of finish that was his trademark at the height of his powers.

BBC: eng-prem

The key to establishing an effective relationship with potential buyers is quick and even instant access to mobile messaging services embedded directly within apps.

FORBES: How Instant Mobile Commerce Will Disrupt The Way You Do Business