Hopper became one of the first programmers of the Mark I digital computer, which is the machine visible in the background of this photograph.

Hopper也成为第一批Mark I电子计算机的工程师。背景图片中的计算机就是Mark I。

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The algorithm can quickly and precisely mark the moving object and its trail by functions of image enhancement, morphological operation, and interframe background subtraction.

该算法运用图像增强、形态学操作、图像差分法，能快速准确标注出移动的物体及其移动轨迹。

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The Beijing kettle bears a four-character Qianlong mark, but the delicate painting style and the subtlety of the background to the panels suggests that it was made early in the reign period.

北京故宫提梁壶署乾隆四字楷书款，观乎其细腻的画工及淡雅的背景，应是乾隆初年的作品。

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Vintage Tube logos form the background of a commemorative Oyster card to mark the 150th anniversary of London Underground rail service in London.

BBC: Oyster card celebrates 150th Tube anniversary

Last December, the FBI recorded a record number of 2.78 million background checks for purchases that month, surpassing a 2.01 million mark set the month before by about 39 percent.

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