Meanwhile, the Drazin inverses of PQ and P - Q are established.同时, 给出正交投影的积PQ和差P -Q 的Drazin逆的表达式.In this paper, we investigate the Drazin inverse of a morphism in additive category.本文研究了加法范畴上态射的Drazin逆....
Revenue from brown goods, including televisions and hi-fis, rose nearly 12 per cent.包括电视机和高保真音响在内的黑色家电的销售收入增加了将近12%。Black - and - white televisions are knocked into a cocked hat by the modern color ones.黑白 电视机远远比不上现代化的彩色...
We needed to do decimals to round up and round down numbers.我们得把小数四舍五入成整数。...simple math concepts, such as decimals and fractions.简单的数学概念，如小数和分数We needed to do decimals to round up and round down numbers...我们得把小数四舍五入成整数。...
When you are sitting, keep your elbow on the arm rest.坐立时，把胳膊肘靠在扶手上。Amy lifted her arm to wave. "Goodbye," she called.埃米举起胳膊挥挥手。“再见，”她喊道。A roll of fat jiggled on the underside of her arm.她胳膊下侧有一层肥肉一颤一颤的。...
They are a lost generation in search of an identity.他们属于迷惘的一代，想要找寻自我。There are conflicting reports about the identity of the hostage.有关人质身份的报道相互矛盾。Spanish identity documents state the bearer's profession.西班牙的身份证件会注明...
The advanced DYNA - CHROME electroplating technology for automotive shock absorber rod was introduced in detail.详细介绍了当今世界上最先进的汽车减振器杆硬铬电镀技术(DYNA-CHROME).Now, new models use nice, shiny chrome, hex - head screws.现在, 新的模型使用...