以前

A simple and efficient method for determining area temperature distribution of the inverse black body radiation problem is presented. It is different from previous works.

提出了一个简单而有效的确定黑体辐射中温度分布的方法，所提出的方法完全不同于以前的方法。

Quantum theory provides accurate descriptions for many previously unexplained phenomena such as black body radiation and stable electron orbits .

量子理论提供了精确的说明，许多以前无法解释的现象，如黑体辐射和稳定的电子轨道。

At 20 years old before,《red and black 》once was a book of my favourite.

在二十岁以前，《红与黑》曾经是我最爱的一本书。

But now we realise that the black hole was far more active in the past.

不过现在我们认识到它在以前要活跃的多。

I used to like black pudding but when I found out how it is made it put me right off .

我以前很喜欢吃黑香肠，但在我发现了它是如何制作后，我便对它感到厌恶了。

The women in our community at home, long ago, all considered themselves experts on the black pudding.

很久以前，在我们社区的女性都认为她们自己是做黑布丁的专家。

As for inflation, if it was a problem before—the old won's black-market rate against the dollar had fallen by 95% since 2002—it is much more so now.

至于通货膨胀，如果它以前是个问题（从2002年起，在黑市上，旧币与美元的汇率比下跌了95%），那现在就是个大问题。

"Who are you?" asked the girl. a long time ago I was a blackbird.

很久很久以前，我是一只黑鸟。

I used to think he was a blackguard.

我以前以为他是坏人。

A professional blackmailer would not want future victims to believe that she has betrayed past customers.

一个专业的勒索者不会想让未来的受害人相信她曾经泄露过以前的受害人的信息。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。