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...
休穿戴整洁地上班去了。Sue had dressed herself neatly for work.孩子们必须学会整洁地写字.Children must learn to write neatly.所有的数据必须明白地和整洁地记录在直列和横列中.All data must be recorded legibly and neatly in straight rows and columns....