介绍了丙二酰氧基硼氢化钾的制备及其原位与烯烃的选择性硼氢化.The preparation of potassium malonyloxyborohydride in situ and its selective hydroboration alkene are described.叙述了丙二酰氧基硼氢化钠的制备及其原位与烯烃的选择性硼氢化反应.The preparation of sodium malonyloxyborohydrid...
The lower dislocation density in bainite is unfavourable for the aggregation and coarsening of carbides.贝氏体中位错密度较低,不利于合金碳化物的聚集粗化.Features and classification of bainite transition was described in detail.摘要详细介绍了贝氏体相变的特征及其...
Yes. So we put the podium onto the stage.可以.那么将讲台摆到舞台上.The towers rise out of a concrete podium.这些塔楼耸立在一个混凝土墩座上。Carlos Nusman presents medals to Lopes and Franco on podium.卡洛斯·纽斯曼向站在奖台上的洛普斯和佛朗科颁发奖章.The speaker has to ad-...
He gazed with deep feeling at his mother's wrinkly face.他深情地望着满脸皱纹的母亲.He thrust out his long arm and snatched his wrinkly vest from a chair.他伸出自己长长的胳臂,抓起了搭在椅子上的那件皱皮疙瘩的背心.His wrinkly face goes down to his hardship du...