她很怕羞,但他还是鼓励她开口说话.She's very shy but he managed to draw her out.她唱歌怕羞.She is coy of singing.怕羞的小男孩退缩着不肯上前来见我们.The shy little boy held back from meeting us....
纤维素是带有好多羟基的不幼链环型布局的聚合物.Cellulose is a very polyhydroxylated of long - chain - type structure of the polymer.使用的催化剂对醇 羟基 的氧化具有高度的选择性并有很高的转化率.These reactions catalyzing oxidation of alcohol - OH groups have high yield and ...