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It's not…It was a long time ago.

这不是…这是很久以前的了。

Yes, but it was a long time ago.

是的，但是那是很久以前的事了。

Yes,it was a long time ago.

是的，那是很久以前的事情了。

B:Yes, but it was a long time ago.

是的，那是很久以前的事情了。

I used to live in US, but that's a long time ago now.

我以前住在美国，但那是很久以前的事了。

I'm afraid I can't remember it was such a long time ago.

很抱歉，我想不起来了--那是很久以前的事了。

Well,it was a long time ago.

噢，这是很久以前的事了。

I don't know. He left a long time ago.

我不知道，他离开很久了

But that was a long time ago.

但这已经是很久以前的事了。

That was a very long time ago.

那是很久以前的事了。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。