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。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。