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- surface availability of catalyst [化] 催化剂的有效表面
- Workers throw animals to the ground and bludgeon them with metal rods or slam them against any hard surface available. 工人们将这些小动物扔在地上，用金属棒打他们或用力将他们摔在任何坚硬的表面上。
- For well-dispersed Pt, all particles are essentially on the surface available for chemisorption by an equal number of oxygen or hydrogen atoms. 对于分散良好的铂，表面上的全部粒子在表面上基本上都能被相同数量的氧原子或氢原子进行化学吸附。
- The fraction of the internal surface available for industrial vanadium catalysts in the oxidation of sulfur dioxide is rather small and becomes even smaller at higher conversions. 正>当传质与传热过程影响催化反应速度时,利用化学动力学方程式严格地计算反应的总速度是一个极其复杂的课题。
- Then the hull without the appendages can be used as a single surface, leaving two surfaces available for design of the deck and cockpit. 空无附加物的船身可以用来当作一个单独的外观，留下另外两种外观在设计甲板和驾驶员座舱时用。
- The gas bubbled to the surface of the water. 气体变成气泡升上水面。
- The surface of the liquid gradually crusted over. 液体表面渐渐地结了一层皮。
- A breeze ruffled the surface of the lake. 一阵微风吹皱了湖面。
- A wave broke across the surface of the pool. 一个波浪从池水表面掠过。
- The calm water surface is very much like a mirror. 那平静的水面十分象一面镜子。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- He is honest only on the surface. 他只是表面诚实而已。
- A film of mucus and bacteria on a tooth surface. 齿菌斑牙齿表面一层粘液和细菌的膜
- The hard outer portion or surface area of bread. 面包皮面包的表面区域的硬皮
- Surface mail takes longer than airmail. 普通邮件比航空邮件慢。
- The surface of the lake is quite still. 湖面相当平静。
- It's2 yuan by surface mail and3.6 yuan by air. 寄平信2元，寄航空要3元6角。
- Wheels won't bite on a slippery surface. 车轮打滑。
- The surface must be thoroughly clean. 表面必须彻底弄清洁。
- The surface between the ribs of a ribbed vault. 梁腹，腹板某扇形拱的胁拱之间的平面
