Microscopically the ores are medium grained to amorphous.显微镜下,矿石为中粒至非晶质.The only local coarse - grained sand - stones in the uppermost part are important for uranium.仅最上面局部的粗粒砂岩对铀是有利的.Fine - grained clay may settle out i...
A prodigal who returns is more precious than gold.浪子回头金不换.A miserly father makes a prodigal son.老子守财奴,儿子败家子.Nature is prodigal of her gifts.大自然不吝惜其恩赐....
The pile repletion measurement, drilling, the embedment of the steel casing and pile drilling are emphasized.强调了桩位复测、护筒埋设 、 钻孔 、 成孔等每道工序在检查过程中需注意的问题.The difficulty also becomes greater. The depth of embedment at the tunn...
Isomerization occur during bromine reaction, that is mean secondary allylic configuration changes into primary allylic configuration.在溴化反应过程中存在分子结构重排, 即溴代仲位烯丙基构型向溴代伯位烯丙基构型发生转化.Isomerization of safrole can afforded isosaf...