to be short

基本解釋

But why does the time frame have to be short?
那我要問，為什么是“短期”的才能有效？
"If you must have it, it needs to be short and well groomed," he cautions.
他警告說：“如果你非要這樣做的話，也要確保胡須要短而整齊?！?/li>
One of the things that everyone agrees about methane on Mars is that it has to be short-lived.
大眾普遍認(rèn)同的一件事是火星上的甲烷的壽命極短。

And this may be cool enough to keep foods fresh, at least for a short time.
If we have a high frequency, what about the wavelength, long or short? All right. Good. So we should always be able to keep these relationships in mind.
如果頻率高，那波長是長還是短？,好，不錯，我們要記住這些關(guān)系,類似的。
麻省理工公開課 - 化學(xué)原理課程節(jié)選
There's a Midterm. That will be a short answer test that's intended to give you a chance to show how diligently you've been reading and coming to class.
我們會有一個期中考，會有一張簡答問卷,目的是能夠讓你們表現(xiàn)出,你們的勤勞，用功閱讀和按時上課。
耶魯公開課 - 現(xiàn)代詩歌課程節(jié)選

Simple exclusion of the opinion of front line people has long been proven to be short-sighted.
FORBES: Business Aviators - Is that all they are, or should be?