无在非洲平原上激起了。
我们如果团结一致，就能在许多合作事业中无在而下胜；
United, there is little we cannot do in a host of cooperative ventures.
燕子在无云的蓝天上飞翔。
太阳在无云的天空中明亮地照耀着。
无保护的皮肤在太阳暴晒下有患皮肤癌的危险。
Exposure of unprotected skin to the sun carries the risk of developing skin cancer.
他那时肆无忌惮地在监狱里经营着每个月$400000的毒品交易。
He was brazenly running a $400,000-a-month drug operation from the prison.
他在无窗的牢房里呆了4年半，大部分时间是手铐脚镣。
He'd spent four and a half years in windowless cells, much of the time in chains.
这些孩子在暴力和无安全感的环境中长大。
The children grew up in an atmosphere of violence and insecurity.
他在默默无闻的工作中度过了大半生。
在特殊情况下，也可能接受无正式文凭的学生。
Exceptionally, students may be accepted without formal qualifications.
她的作品在20世纪大部分时间里都湮没无闻。
每次你进行无保护措施的性爱都是在冒不可预料的风险。
You are playing Russian roulette every time you have unprotected sex.
大多数无脊椎动物在一次（物种）灭绝浪潮中消失了。
Most invertebrate species disappeared during a wave of extinctions.
当测试对象被要求在无噪声条件下对书面材料进行校对时，不同的噪声条件会产生不同的后效应。
The different noise conditions had quite different after-effects when the subjects were required to proofread written material under conditions of no noise.
冰减少的越多，形成的无冰水面就会越多，这些无冰水面在夏天时的温度会持续升高，在冬天结的冰就会减少，来年夏天也会有更多的冰融化。
The more you lose, the more open water is created, the more warming goes on in that open water during the summer, the less ice forms in the winter, the more melt there is the following summer.
近一个世纪前，生物学家发现，如果他们在无脊椎动物胚胎生命的早期阶段将其分成两部分，它会存活下来并发育成两个正常的胚胎。
Nearly a century ago, biologists found that if they separated an invertebrate animal embryo into two parts at an early stage of its life, it would survive and develop as two normal embryos.
蚂蚁保持凉爽的方法在动物中是独一无二的。
男低音也许是在多年的劳累和默默无闻的劳动之后，才在那里绝迹的。
Bass may have perished there after years of wearisome and unknown labour.
在我们第一个无屏幕日之后，学生们提到他们惊讶于自己很享受这一天。
After our first screen-free day, students mentioned that they were surprised they enjoyed it.
在斋戒期间，他们不能吃任何食物，只能喝水、茶和无渣果汁。
During the fast, they could not eat any food at all, and they could only drink water, tea and clear fruit juice.
在加油站干了三年无薪工作之后，我仍然没能找到一份入门级的工作。
After three years of working in a petrol station and doing unpaid work I still hadn't managed to get an entry level job.
在《清洁空气法案》强制要求美国使用无铅气体的二十年里，铅在世界范围内的累积量显著下降。
In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.
由于技术在吞噬人类工作方面非常“贪得无厌”，所以这一现象将会继续以短时间难以预料的方式重构我们的经济。
Since technology has such an insatiable appetite for eating up human jobs, this phenomenon will continue to restructure our economy in ways we cannot immediately foresee.
月球的自转和倾斜在太阳系的其他行星体中是独一无二的。
The Moon's spin and tilt are unique among other planetary bodies in the solar system.
其他海龟都不能游到它所能游到的寒冷的北部和南部海域，而且它处理寒冷水域的方式在爬行动物中是独一无二的。
It swims farther into the cold of the northern and southern oceans than any other sea turtle, and it deals with the chilly waters in a way unique among reptiles.
人们在针叶树和某些其它树木的硬化树脂中发现了昆虫，甚至发现了小型无脊椎动物。
Insects and even small invertebrates have been found preserved in the hardened resins of conifers and certain other trees.
在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。
In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.
从阿拉斯加东南海岸岛屿的洞穴中提取的化石的放射性碳年代测定法表明，在最后一个冰河时代，该地区至少有一部分保持无冰状态。
Radiocarbon dating of fossils taken from caves on islands along southeastern Alaska's coast suggest that at least a portion of the area was remaining ice-free during the last ice age.
在这一年中，我们已经安排了几个无屏幕日，这需要我们为学生制定不同的计划，涉及他们在没有“屏幕”的情况下如何与彼此和周围的世界交流。
During the course of the year, we have built in several screen-free days that require us to make different plans for our students about how they will communicate with one another and the world around them without "screens".
在这一年中，我们已经安排了几个无屏幕日，这需要我们为学生制定不同的计划，涉及他们在没有“屏幕”的情况下如何与彼此和周围的世界交流。
During the course of the year, we have built in several screen-free days that require us to make different plans for our students about how they will communicate with one another and the world around them without "screens".
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