The city of Chengdu lies some seven hundred miles to the South-East.成都市位于东南方大约700英里处。The heaviest snowfalls today are expected in the south east.今天最大的降雪预计将出现在东南部地区。Light airs blew gently out of the south-east.东南风徐徐吹拂。...
When the plating exist defect, the gold - plating nickel - plating both promote the stress - corrosion fracture of Kovar alloy.在镀层存在缺陷时, 镀金、镀镍层均促进柯伐合金的应力腐蚀开裂....
在一定条件下,电子可以作波状运动,而不是粒子状运动。Under certain conditions, electrons can behave like waves rather than particles.原子核由中子 、 质子和其他粒子构成.The nucleus of an atom consists of neutrons, protons and other particles.物质微小的粒子中束缚着惊人的力.Tremen...