Smoking narrows the tiny blood vessels in the outermost layers of skin , which decreases blood flow .
吸烟将使皮肤最表层的毛细血管变窄,这将使血液流动变慢。
South of sukkur , where a barrage modifies river flow , the indus narrows somewhat , but flooding is apparent there as well .
苏库尔的南面,有一条堤坝挡住河流,印度河在这也变窄了,但是洪水还是蔓延到了那儿。
For example , engineering company arcadis proposed running one across the verrazano narrows , back in 2009 .
例如,早在2009年,工程公司阿卡迪斯计划建立一个横跨韦拉扎诺海峡的屏障。
Let 's consider taking a picture of the same object while only varying the focal length of the system . As the focal length increases the fov narrows , increasing the size of the image on the detector .