石蕊: 从几种地衣类植物中获取的带色有机化合物的混合物.Litmus: Mixture of coloured organic compounds obtained from several species of lichens.例如石蕊和酚酞.Examples are litmus and phenolphthalein.它能改变指示剂的颜色,使石蕊和通用指示剂变蓝.It can change the color of the ind...
This room is sunning and bright.这间房子既向阳,又透亮.On the beach the officers were still sunning themselves, playing bridge or talking.海滩上的军官有的在沐日光浴, 有的在打桥牌,也有的在聊天.They jumped and cheered, tears sunning down their faces.他们又叫又喊, ...
中国有世界最古老的树种 -- 水杉.China has the world's most ancient tree species -- metasequoia.采用正交试验方法,确立了徽波法提取水杉黄酮的提取工艺条件.The extraction technology of flavonoid in Metasequoia microwavean orthogonal test was studied.2005年7月25日,...
With di - iso - butyl dimethoxy DIBS, DQ catalyst was more sensitive to hydrogen regulation.使用二异丁基-二甲氧基硅烷, DQ催化剂的氢调敏感性更好.Ethylene Glycol Dimethyl Ether ( see 1 , 2 - Dimethoxy - ethane )亚乙基二醇 ( 见乙二醇 )Dimethyl 4,4'- ...