一时的英文：
temporary
momentary

参考例句：

A transient success
一时的成功

A transient emotion
一时的感情

The curtains were an impulse buy.
这窗帘是一时心血来潮买下的。

Slang words are often ephemeral.
俚语往往只流行于一时。

Slang words are often ephemeral
俚语往往只流行於一时

At home it is always pleasant ;far away from home it is always unpleasant .
在家千日好，出门一时难。

It was a freak of mine to wear pink pajamas.
穿上粉红色睡衣是我一时的奇想。

A dragon and a tiger spring up at the same moment; Then in a hundred waterfalls ten thousand songs of autumn.
龙吟虎啸一时发，万籁百泉相与秋。

That guilt, though it may attain temporal splendor, can never confer real happiness.
犯罪的人纵能荣耀一时，却不能得到真正的幸福。

phantom tumour
(歇斯底里症患者腹部的)一时肿胀,虚瘤

temporary是什么意思：
adj. 临时的；暂时的
n. 临时雇员；临时事物

She works in the office as a temporary.
她在办公室做临时雇员。

A temporary or expedient substitute for something else.
权宜之计暂时或临时替代其它事物的东西

But temporary workers are also a buffer for unions.
但临时工同样也是工会的“减震器”。

The wartime temporaries will be replaced by permanent homes.
那些战时临时住房将被永久性住宅代替。

A dependant may apply for temporary protection.
受养人可以申请临时保护。

momentary是什么意思：
adj. 瞬息的，短暂的

A momentary flash of light;a sparkle.
闪光短暂的闪光；闪耀

His hesitation was only momentary.
他只迟疑了一下。

Giving a momentary or superficial impression of brilliance.
闪烁的，炫耀的给人以短暂或表面印象的光彩或才华的

The fit is momentary; upon a thought he will again be well.
发作是短暂的；一会儿他就会好的。

A momentary lapse of unreason - reversing sterilization in Asia
暂时的不合理过失——扭转亚洲的冲销