不凑巧的

Locking a file is a lot like borrowing a book from the library; if Harry has locked a file, then Sally cannot make any changes to it. If she tries to lock the file, the repository will deny the request. All she can do is read the file, and wait for Harry to finish his changes and release his lock.

考虑这个情景，我们有两个共同工作者，Harry 和 Sally，他们想同时编辑版本库里的同一个文件，如果首先 Harry 保存它的修改，过了一会，Sally 可能凑巧用自己的版本覆盖了这些文件，Harry 的更改不会永远消失(因为系统记录了每次修改)，Harry 所有的修改不会出现在 Sally 的文件中，所以 Harry 的工作还是丢失了

And there, too, was a barrel outside the door,quite accidental－ly; but it was not a barrel of gold—it was a barrel of sweepings.

说来也凑巧得很，他的房门外也放着一个桶，不过这个桶里装的不是金币，而是一堆垃圾。

Durbeyfield was what was locally called a slack-twisted fellow; he had good strength to work at times; but the times could not be relied on to coincide with the hours of requirement; and, having been unaccustomed to the regular toil of the day labourer, he was not particularly persistent when they did so coincide.

德北菲尔德是当地称为懒散骨头的那种人；有时候他倒挺有力气工作；不过这种时候是靠不住的，因为不能碰巧有工作需要他；而且，他由于不习惯做日工的正规劳动，所以每当凑巧有工作的时候，他又特别缺乏毅力。

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。