碰巧

I know the answer of that question by chance.

我碰巧知道你那道问题的答案。

I met him in London by chance.

我碰巧在伦敦遇到了他。

I know that your question's answer by chance.

我碰巧知道你那道问题的答案。

I know the key to the question by chance.

我碰巧知道你那道问题的答案。

Then it happened that I had to answer the call of nature.

当时我碰巧要回答自然的召

So, using infrared light, astronomers have just found a small galaxy of about a billion stars in the constellation Canis Major, that is -- astonishingly -- only about 25,000 light-years away from the Sun.

碰巧，通过红外线，天文学家已经发现了一个较小的由数十亿恒星组成的名为"Canis Major"星座的星系，这是非常令人惊讶的！

I happen to catch a glimpse of the video on a television .

碰巧看了电视上的录像。

I happen to be one of those who were struck by the magic wand. On that fateful weekend, while I was a sophomore at Cornell University, I had a terrible cold and hesitated to join my family on vacation in the Catskill Mountains. Finally I decided anything would be better than sitting alone in my dormitory room.

我碰巧是被这种魔杖击中的人之一，在那个宿命的周末，我在康奈尔大学上大二，我得了重感冒，因此犹豫我假期是否去卡茨基尔山的跟家人一起度假，最后我决定做什么事情都比我独自一人坐在宿舍里好。

And then I happened to see the cellar door open. And there was a light on downstairs.

然后我碰巧看到地下室的门开着，楼下的灯开着。

By chace When he visited me last night,I was not...

他昨晚来看我时，我碰巧不在家。

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。