常見例句雙語例句My friend says that I have a water-retention problem.我的朋友說我有保水的問題。The influencing factors of water-retention rate are analyzed and testing parameters are determined.設計了真空吸收法實驗裝置，利用該裝置測定的保水率與傳統(tǒng)濾紙法進行了對比。ASP has high water-reducing rate and low slump loss, but it is expensive, and the water-retention of concrete is bad, which limit its application.氨基磺酸系高效減水劑ASP的減水率高、坍落度損失小，但價格較高、混凝土保水性差，限制了其應用。 返回 water-retention