碰巧

Perhaps you might chance on the at some old bookstall .

或许你会碰巧在旧书摊上买到这本。

Perhaps you might chance on the dictionary at some old bookstall.

或许你会碰巧在旧书摊上买到这本辞典。

Perhaps you might chance on / upon the dictionary at some old bookstall.

或许你会碰巧在旧书摊上见到这本字典。

Well, that's just the breaks, you know?

这个嘛，那只是碰巧发生的，不是吗？

I appreciate if you would let me know if you happen to find these minor bugs.

我明白，如果你让我知道，如果你碰巧发现这些小错误。

I happened to bump into you along the way.

我只是碰巧遇见了你。

I happened to find the letter on the back porch of the bungalow.

我碰巧在平房的后门廊发现了这封信。

If you caught your son burning ants with a magnifying glass, would it bother you less than if you found him torturing a mouse with a soldering iron?

如果你碰巧看到你的儿子正在用放大镜灼烤蚂蚁，你会有什么感觉？是不是没有比你看到他用烙铁虐待老鼠时那样生气呢？

One morning,on his way work,Ron throws a burrito out of his car,it happens to knock at a motorcycle driver's head.

一天早上，在他上班的路上，罗恩将一个玉米饼扔到了车窗外，它碰巧砸到了一个摩托车驾驶员的头上。

I happen to know that you're burying my cat.

我碰巧知道你要埋我的猫

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。