您要查找的是不是：
- Three air letter sheets, please. 请给我两张航空信笺。
- She sent him a surface letter. 她寄了封平信给他。
- 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 sheet or surface of glassy and very slippery ice. 光滑明亮的表面光亮的和很光滑的冰的表层或表面
- 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。
- 1951 RN2 Type Tien An Men Design Colored New Year Letter Sheet, list of "Notice for Use" printed on reverse, tied by Heixian dater and Xinlitun arrival marking, scarce, VF-F 1951年辽宁黑县七区寄九区邮简，简为普东2型天安门图春节彩图邮简，背文字为“利用须知”，销黑县5月27日戳，有新立屯5月27日到达戳，较少见，上中品
- 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
- letter sheetn. 信纸(邮简)
