常見(jiàn)例句雙語(yǔ)例句Methods: To preparation of gel , Carbomer was used as base , and Triethanolamine as neutralizer, the fresh extract of cholla stem and niacinamide etc were added to the gel .方法：以卡波姆為基質(zhì)，三乙醇胺為中和劑，制備凝膠，加入仙人掌鮮汁、煙酰胺等即得仙人掌消痤凝膠； 返回 Cholla Stem