德国啤酒传统上只用4种原料——啤酒花、麦芽、酵母和水。German beer has traditionally been made from just four ingredients — hops, malt, yeast and water.啤酒花有两种基本类型: 苦型和香型酒花.Beer hops has two basic types: bitter hops and aroma hops.啤酒花的短缺仅是问题的冰山一角.Th...
杂原子数越多, 分子被氧化的程度越高.The larger the number of heteroatoms, the more highly oxidized the molecule.关键反应为底物控制的不对称杂原子共轭加成反应.The key step was a substrate controlled asymmetric heteroatom conjugated addition.杂原子烯反应是该反应的重要组成部分.Th...
The modification of gear is a principal method for improving performance meshing.齿面修形是提高齿轮副啮合性能的重要手段.Exact modeling of gear teeth is based on meshing theory.摘要根据齿轮啮合原理,建立了轮齿的精确齿形.Meshing method is one of the key factors ...
这种两面周旋的态度在整个寄居海外运动中极为明显.This dual tug is apparent in the whole movement of expatriation.我朋友寄居在我叔叔家.My friend lodges in my uncle's house.他暂时寄居在伯[叔]父家.He sojourned with his uncle....