在英语中，“a”和“an”被称为不定冠词，“the”被称为定冠词。
In English, "a" and "an" are called the indefinite article, and "the" is called the definite article.
甚至漆器，相对于陶瓷或者玉，其市场行情更加捉摸不定，像荡秋千一样。
Even lacquer, which is a more uncertain market than either porcelain or jade, went as a swing.
孩子们在位子上心神不定地动来动去。
在一切得以解决之前还有很多不定因素。
There are still a lot of ifs and buts before everything's settled.
商人们对经济政策的飘忽不定感到气愤。
Businessmen are displeased with erratic economic policy making.
这个国家在基督教和异教之间摇摆不定。
The country swayed precariously between Christianity and paganism.
有两个新来的人，坐立不定，等着提问。
There were two new arrivals, fidgeting around, waiting to ask questions.
乔治犹豫不定—他是该去呢，还是不该去？
他的表情在不露声色与茫然之间变幻不定。
他不定期地看望父母。
他们在一起度过了分分合合动荡不定的五六年。
They had been together for five or six turbulent years of break-ups and reconciliations.
她让人捉摸不定的魅力和无厘头的作风是个传奇。
我知道葆拉自彼得叔叔去世以来有多么心神不定。
I knew how unbalanced Paula had been since my uncle Peter died.
阿根廷动荡不定的通货膨胀率有打乱这些计划的危险。
Argentina's erratic inflation rate threatens to upset the plans.
不知道我下一步棋该怎么走，我的手在棋盘上方举棋不定。
With no idea of what to do for my next move, my hand hovered over the board.
她举棋不定，不知是在这个城市里买所房子，还是迁居他处。
She's wavering between buying a house in the city or moving away.
帕特里克漂泊不定的生活方式使他在伦敦和洛杉矶之间奔波。
Patrick's roving lifestyle takes him between London and Los Angeles.
离终场还有十分钟，我们以0:2落后，随后我们进球了。谁输谁赢还说不定呢！
We were losing 2–0 with ten minutes to go, and then we scored. It was game on!
他的新剧本《阿卡狄亚》是他迄今为止创作的最错综复杂、煞费苦心和让人琢磨不定的。
His new play, Arcadia, is as intricate, elaborate and allusive as anything he has yet written.
起初，你摇摆不定，但是过一段时间就变得毫不费力了。
你知道，经济不景气使全球货币像坐过山车一样起伏不定。
You know that troubled economic times have put global currency on a roller coaster ride.
兄弟中最小的往往捉摸不定，比较浪漫，最适合兄弟姐妹里的姐姐。
A youngest brother of brothers, often unpredictable and romantic, will match best with an oldest sister of brothers.
很多年过去了，在伦敦火车站下车的这位年纪不定的优雅女士是谁呢？
Years have rolled by, and who is this elegant lady of uncertain age alighting at London Station?
这就导致很多美国人骨子里就是不安于现状、漂泊不定而且野心勃勃的人。
As a result, many Americans were inveterately restless, rootless, and ambitious people.
随着全球市场继续在另一场萧条的边缘摇摆不定，全球各国央行都面临着艰难的货币政策平衡行动。
As global markets continue to see-saw on the verge of another recession, central banks across the world face a difficult balancing act of monetary policy.
你是否还在为圣诞节资金或者光明节钱款拿不定主意？这儿有个打折消息：国际空间站10天之旅。
Are you still hanging on to your Christmas cash or Hanukkah gelt? Here's something for sale: 10-day trips to the International Space Station.
它显现了在彻底拒绝和有条件地接受这一媒介的两者之间的摇摆不定，而这正是艺术机构的典型特征。
It is symptomatic of the swing between the outright rejection and qualified acceptance of the medium that was fairly typical of the artistic establishment.
煤气可与烟雾缭绕的油灯和摇曳不定的蜡烛相媲美，在新世纪之初，富裕的伦敦人逐渐习惯了有煤气照明的房子，甚至街道。
Coal gas rivaled smoky oil lamps and flickering candles, and early in the new century, well-to-do Londoners grew accustomed to gaslit houses and even streets.
对三头阿拉斯加的黑熊的心率追踪显示出它们在冬眠前的平均每分钟55 下降低到了冬天里每分钟飘忽不定的14 下。
Heart rate tracking for three of the Alaska bears showed a drop from 55 beats per minute on average before hibernation to 14 erratic ones per minute in winter.
她忖量了半天，还拿不定主意。
She turned the matter over in her mind for a long while, but still could not come to a decision.
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