Titanium in the pure state can exist in either of two allotropic forms.纯钛以两种同素异形的形式存在.Carbon and sulfur and phosphorus are allotropic elements.碳、硫磺和磷是同素异形元素.Ozone ( O 3 ) is allotropic form of oxygen ( O 2 ) with three a...
Good luck is when an opportunity comes along and you're prepared for it. 好运就是当机会来临时，你早已做好了准备。Many students are not adequately prepared for higher education.许多学生并未做好接受高等教育的充分准备。A minority of officers were prepared to...
A muscular spasm in the coronary artery can cause a heart attack.冠状动脉的肌肉痉挛可能导致心脏病。The greatest occurrence of coronary heart disease is in those over 65.65岁以上者是冠心病的最高发人群。A hundred years ago coronary heart disease was virt...
基准状态是无磁化的回归基准制记录法.Return - to - reference recording in which the reference condition is the absenceof magnetization.某些金属具有导电能力和被磁化的能力.There are some metals which possess the power to conduct electricity and ability to be...