Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts.大多数连于芳核能被直接取代的基团仅限于重氮盐.Severe steric effects at the reactive carbon would impede the substitution.大的立体效应阻止在碳上的取代.We use saccha...
垂体的大小小于正常.The pituitary gland is somewhat smaller than expected.在伸入到腺垂体的神经纤维中存在一些未知的空泡结构.There are some vacuoles in the nerve fibers which are thrusted into the adenohypophysis....
A leakage of kerosene has polluted water supplies.泄漏的煤油污染了水源。It is the handwheel adjustment of the kerosene stove wick.这是煤油炉炉芯的手轮调节处.Kerosene is a by - product of petroleum refining.煤油是提炼石油的 副产品.Instead of electricity, t...
这些额外的木楔是以防万一的.These were extra wedges in case they should be needed.他把木楔打进木材缝中.He inserted the wedge into a split in the log.凡是的办理办法是用塞木楔来举行把持, 使纸弛保留在统一立体上.The general approach is chock wooden wedge for control, making p...
BUNa - N is a general purpose oil resistant polymer known as nitrile rubber.丁腈橡胶(BUNa-N )是一种多用途抗油品腐蚀聚合物,称为腈橡胶.Leather, rubber and wire are flexible.皮革、橡皮和电线都是易弯曲的。A synthetic rubber made from the polymerization of butadi...
You can move the camera both vertically and horizontally.你可以上下左右移动摄像机。Line the pages for the graph both horizontally and vertically.在这几页上同时画上横线和竖线,以便制作图表.Unlike some birds, it does not dive vertically.和一些鸟不一样, 这种鸟不垂直向下飞....