牛脂醇可以进一步提炼成十六烷和十八烷醇.Tallow alcohol can be further refined into cetyl and stearyl alcohols.建立了一种测定白桦树皮中白桦脂醇对羟自由基清除率的新方法.A new method of determining the antioxidant activity of betulin from betula bark is established....
As long as the verticals align, the design will look regular.只要所有垂直面在一条线上，图案看起来就会很整齐。The undulating planes of the countryside provide relief from the hard horizontals and verticals of the urban scene.乡村起伏不平的地势使人们摆脱了城市刻板的...