background of mark

基本解释

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。
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。
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。

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.
FORBES: Disarming Realities: As Gun Sales Soar, Gun Crimes Plummet