He managed to free one hand to ward off a punch.他设法挣脱出一只手来挡住了一拳。The ward was busy and Amy hardly had time to talk.病房里非常忙碌，埃米几乎没有时间说话。She gave me a straightfor-ward answer.她坦率地回答了我。Such a thin padded coat cannot ward off ...
必须知道各种材料的热导率和热扩散率.The thermal conductivities and thermal diffusivities of the material must be known.石英岩和岩盐的热导率最高.Quartztes and rock salt have the highest conductivities.在各向异性的非均质材料中,热流向量和热导率很复杂.In heterogeneous anisotro...
在所有简单无害的娱乐项目背后都隐藏着危险，特别是对儿童而言。Under all the innocent fun, there are hidden dangers, especially for children.该行业一直在努力开发一些可以替代这些气体的无害物质。Industry has been working at developing harmless substitutes for these gases.棕榈油对环境无害。...
The definition of operator homeomorphism mapping , together with its characterizations, is given in this paper.在算子开集理论中给出了算子同胚映射的概念, 得到了算子同胚映射的若干性质....