Astronomers think the object shown in this Chandra X-ray Observatory image (in box) may be an elusive intermediate-mass black hole.
天文学家们认为在上面那张钱德拉X射线天文台的图片的匣子里的物体可能是一个难以捉摸的中等质量黑洞。
2
The cable anchoring zone on the cable tower of the Wuhu Yangtze River bridge is of pre stressed reinforced concrete box structure without intermediate beam.
芜湖长江大桥桥塔拉索锚固区为预应力混凝土箱形结构，无中间梁，索塔锚固区为单箱单室结构。
3
A key combination that provides one-stroke access directly to a command or dialog box, bypassing any intermediate menus.