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- Its effective aperture is 0.9 nm and ratio surface area of BET is 583 m2/g. The capacity of its exchangeable cation is 316 meq/100g. 分子筛有效孔径约为0.;9 nm;BET比表面积583m2/g;阳离子交换容量(CEC)316 meq/100 g。
- The nanomaterials as catalysts have high ratio surface area and high surface energy, showing much higher catalytic activity than traditional catalysts. 摘要纳米尺度的催化剂具有高的比表面积和表面能，其催化活性显著高于传统催化剂。
- The particle's diameters of nano-particle and " de Broglie" wavelength of election are about the same length/The nano-solids are made of nano-particles with big ratio surface. 由纳米微粒构成的纳米固体又存在庞大的界面成分。
- 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。
- The ratio of students to teachers is 35:1. 学生和老师的比率是三十五比一。
- The ratio of schoolboys to schoolgirls is 2 to 1. 男学生和女学生的比例是2比1。
- 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
- Surface mail takes longer than airmail. 普通邮件比航空邮件慢。
- Men outnumber women here in the ratio of three to one. 此地男子数量以三比一超过女子。
- The surface of the lake is quite still. 湖面相当平静。
- The first or last term of a ratio or a series. 首项，末项比率或数列中第一个或最后一个项
- 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。
