这真是个难题。
如何提高产品质量对他来说可是个难题。
How to improve the quality of products was a difficult problem to him.
我有个难题。
美国有一个问题,通常只有有钱人家的孩子才能去最好的学校上学,而这实际上是一个难题。
We have a problem in the United States that usually only wealthy kids go to the best schools and it's kind of a problem actually.
你得弄到她的姓名和住址,而这可能就是第一个难题。
You must get her name and address, and that can be a problem for a start.
这给气候科学家们带来了一个难题。
对于那些使用恒定的冰川融化的水作为饮用水的数百万人来说,冰川面积不断缩小是一个难题。
Shrinking glaciers are a problem for million is of people who use regular glacier melt for drinking water.
这带来了两个难题。
蝙蝠有一个难题:如何在黑暗中找到自己的路。
Bats have a problem: how to find their way around in the dark.
安迪有一个难题。
这就造成了一个难题:数百万年前消失的特征是如何突然重现的?
And this poses a puzzle: how can characteristics that disappeared millions of years ago suddenly reappear?
即使没有区域差异的问题,岩石作为独特的时间标记也是一个难题。
Even without the problem of regional differences, rocks present a difficulty as unique time markers.
专家们一致认为在未来几十年内将出现一个难题:如何在不破坏地球的情况下养活90亿人口。
Experts agree that the next few decades will present a puzzle: how to feed nine billion people without wrecking the planet in the process.
提出了一个难题,这难题就基于复制。
And the difficulty was basically the problem of duplication.
另一个难题是缺少良好的动物模型。
爱情它是个难题,让人目眩神迷。
第三个难题在于援助的有效性。
汉语的语调和汉字好像都是个难题。
The tones of Chinese and Chinese characters all seem to be a difficulty.
尽管巴基斯坦又出现了一个难题。
汉语的语调和汉字好像都是个难题。
T he tones of Chinese and Chinese characters all seem to be a difficulty.
这是个难题,因为访客没有告诉你。
第一个难题——至少就时间上来说——是团结。
在开始的时候存在一个难题。
从技术角度看,可伸缩性是一个难题。
区分合法矿主和非法占有者是个难题。
Distinguishing between legitimate miners and rogues is hard.
一切听起来都合情合理,但有一个难题。
现在,这又给新罕布什尔州出了个难题。
为显示提供信息的动态国际化是一个难题。
Providing dynamic internationalization of information for display is a difficult problem.
当靶子用光了,新靶子的进口是一个难题。
When the targets run out, importing fresh ones is a problem.
当靶子用光了,新靶子的进口是一个难题。
When the targets run out, importing fresh ones is a problem.
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