Only the four usual binary arithmetic operations (addition, subtraction, multiplication and division) are allowed.
只能使用四个二元算术运算符(加、减、乘、除)。
Only the four traditional early starters-iowa, New Hampshire, Nevada and South carolina-were permitted to hold contests in February.
根据规定，所有州中只有四个传统“领先起跑”的州能够在2月进行初选。这些州包括爱荷华州，新罕布什尔州，内华达州以及南卡罗来纳州。
They've invited all their friends (but only the four that know how to scuba dive are going to attended. ) Lillian had a special white wedding wetsuit made.
莉莉安订做了一件特别的白色婚礼用保温潜水服。
Some people take a simplistic view and believe that China's stimulus package means only the four trillion RMB yuan investment. This is a total misunderstanding.
有人把一揽子计划简单说成是4万亿投资，这是一种误解。
The happy days only lasted four days.
幸福的日子只持续了四天。
After four months, the patients using the computerized CBT programs had no improvement in depression levels over the patients who were only getting usual care from their doctors.
4个月后，使用计算机化认知行为治疗方法的患者的抑郁程度并没有比只接受医生常规治疗的患者有所改善。
The human brain needs to be without oxygen for only four minutes before permanent damage occurs.
人脑缺氧只需4分钟就会造成永久性损伤。
Only four British players have entered for the championship.
只有四名英国运动员报名参加锦标赛。
Only 18.8% of the class of 1982 had some kind of diploma four years after high school, versus 45% of the class of 1972.
相对于1972届学生中有45%在中学毕业4年后获得了某种文凭来说，1982届学生的这一比例只有18.8%。
Paula is the only artist to achieve four number ones from a debut album.
葆拉是惟一一位首发专辑获得4个畅销榜冠军的音乐家。
These carnivores live only on four small islands in the archipelago where, scientists note, the prey base is too small to support mammalian carnivore.
科学家指出，这些食肉动物只生活在群岛中的四个小岛上，那里的猎物基数太小，哺乳类食肉动物无法生存。
He only says four things, and the fifth he keeps to himself.
他只说了四件事，而第五件只有他自己知道。
Researchers suggest that humans would only survive for four years if the bees disappeared.
研究人员认为，如果蜜蜂消失了，人类就只能存活四年。
According to a recent survey of admissions officers, only one in four private colleges say the essay is of "considerable importance" in judging an application.
根据最近对招生官的一项调查，只有四分之一的私立大学表示，论文在评判申请时“相当重要”。
Responses suggest that numeric people have some trouble keeping track of how many nuts remain in the can, even if there are only four or five in total.
回答表明，数字型的人很难记住罐头里还剩下多少坚果，即使总共只有四五个。
Worker with a four-year college degree earned $50,900, 62% more than the $31,500 earned by a worker with only a high-school diploma.
四年制大学学历的员工年薪为50900美元，比只有高中学历员工的31500美元要高62%。
Miss Rottenmeier obeyed the summons with the greatest indignation, for it was only half-past four in the morning.
罗特麦耶小姐非常气愤地听从了召唤，因为此时才凌晨四点半。
But that wasn't the only obstacle we had to overcome as a couple — we also lived four and a half hours away from one another.
但这不是我们在一起要克服的唯一的阻碍——我们之间还相隔着四个半小时的路程。
I only have thirty minutes to clear customs in getting to the city center and it means I have to check in by five-thirty, which means leaving home at about four fifteen.
我只有30分钟的时间来办理去市中心的海关手续，这意味着我必须在5点30分办理登机手续，也就是说我必须在4点15分左右离开家。
The competition only happens every four years, and the last time the team went, they won the third place in the nation.
这个比赛每四年举行一次。上次这个队去参赛的时候，他们获得了全国第三名。
Only five members were left: the manager and four others, all over 60 years old.
只有五名成员留了下来，即经理和其他四人，他们都超过60岁了。
Between 1984 and 1993, he once tried to save four fish, but only one stayed alive and returned to the river.
在1984年至1993年期间，他曾试图拯救四条鱼，但只有一条活了下来，并返回河中。
According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.
她的研究表明，人在跑步时，脚每次着地对地面的压力相当于自身体重的四倍，而竞走者不完全离开地面，其每步的压力只有自身体重的1.4倍。
With the help of his father-in-law, a builder, he moved into a comfortable new home after only four months.
在建筑工人岳父的帮助下，仅仅4个月后，他就搬进了舒适的新家。
According to a study by Australian National University, Australian children and Chinese children have the same level of eyesight before they start school, but once they enter primary school, Chinese children only spend about an hour a day outside, while Australian children spend three to four hours each day in the sunshine.
澳大利亚国立大学的一项研究显示，澳大利亚的孩子和中国的孩子在入学前的视力水平相同。但是一旦他们进入小学，中国的孩子每天只会在户外度过一个小时，而澳大利亚的孩子每天在阳光下待三到四个小时。
The next morning, as I was looking listlessly over the papers at breakfast, I came across this paragraph: PERJURY—Mr. Mark Twain, a candidate for Governor, was convicted of perjury by thirty-four people, in Wakawak, in 1863. He intended to rob a poor woman of her land, her only stay and support after her husband died.
第二天早上，我吃早餐时无精打采地看着报纸，看到了这段话：1863年，于瓦卡瓦克，34人控告州长候选人马克吐温先生作伪证。他打算掠夺一个贫穷女人的土地，她丈夫死后，这块地是她唯一的容身之所和支撑。
Research suggests only one in four knows the harm cigarettes or second-hand smoke can cause.
研究表明，四个人里面只有一个知道香烟和二手烟可能造成的伤害。
Ovid describes only four ages, omitting the age of Heroes.
奥维德的描述只有四个时代，漏掉了英雄时代。
Let's assume that the four opportunities above were the only ones you needed for your business case.
让我们假设你的商业用例只需要上面提到过的四个机会。
Let's assume that the four opportunities above were the only ones you needed for your business case.
让我们假设你的商业用例只需要上面提到过的四个机会。
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