The isocyanates can be obtained by the fluorination of nitrogenous cylic or acyclic molecules.异氰酸酯可由含氯的环(或非环)状分子氟化而得.A heavy - duty magnetic stirrer , such as Cole - Parmer model is needed during the fluorination.在氟化过程中需...
根据所报道的各种防霉剂特性,自配了针对变色移膜革的复合型防霉剂.It is proved that the self - made antifungal agentantifungal effect , by the inhibition.目的: 研制用自配试剂代替AVL—9130型电解质分析仪试剂.Objective: Study and prepare reagents instead that of AVL 9130 Electr...
When all the instruments had been checked out,the pilot signalled that he was ready for takeoff.所有仪表都检查过之后,驾驶员发出起飞准备就绪的信号。The marriage signalled James's embrace of the Catholic faith.这桩婚姻标志着詹姆斯皈依了天主教.The visit signa...
结束后,视读仪开始收到地面上.When he was done , the teleprompters quietly began retracting down to the floor.骨量足,后视时,肘关节与地面垂直.Ample bone carried right down to feet. Hocks straight when viewed from behind....
But now high level delegations will reopen talks that broke up earlier this year.但现在高层代表团将恢复今年早些时候终止的对话。Trade delegations abroad jointly organised with member universities business institutions.与会员大学合办海外贸易考察团.All delegat...
最好的雕刻工具是锋利而柔韧的长刻刀。The best carving utensil is a long, sharp, flexible knife.刻刀可象绘图笔一样,固定在简易的刀架上.The cutter can be mounted like a pennib in a simple holder.卡萝尔又在捉摸着桌上那把雕刻刀了.Carol again studied the carving - knife on the t...