您要查找的是不是：
- Leaf blade margin coarsely double dentate to double serrate or lobulate, lobes dentate to serrate; corolla adaxial lip 4-7 mm wide, abaxial lip 7-8 mm, lobes oblong to obovate. 粗的叶片边缘重牙齿到具小裂片重锯齿的或，对有锯齿具牙齿的裂片；4-7毫米宽的花冠正面唇，背面唇毫米，裂片长圆形到倒卵形。(12
- North American deciduous tree (Ulmus americana) having double serrate leaves and winged fruits. It is grown chiefly as an ornamental shade tree but often dies from Dutch elm disease. 美洲榆：一种北美落叶树（美洲榆），有双齿叶和双翼果，主要作为观赏性浓荫树，但常患荷兰榆树病而坏死
- Branches terminating in a bud, but without spine. Leaf blade abaxially white hirsute, adaxially pubescent on veins, base inequilateral, margin conspicuously deeply serrate or double serrate. 分枝顶生在一芽，但是没有刺的；叶片背面白色具长硬毛的，正面短柔毛在脉上的，不等侧的基部，边缘显深深有锯齿或著重锯齿的。
- He is working double tides to finish his essay. 他日夜苦干，赶写他的文章。
- I do not realize it is a double feature. 我原先不知道这是双片连映。
- leaf blade broadly ovate, ovate-elliptic, or oblong, 6-9 X 4-6 cm, base subcordate to rounded, margin coarsely double serrate. 宽卵形，卵状椭圆形，或长圆形的叶片，4-66-9X厘米，基部近心形到圆形，粗重锯齿的边缘。
- Double agents live in a perpetual state of fear. 两面派永远过着提心吊胆的生活。
- I want a double room with a view. 我要一间能看到风景的双人房间。
- He was so fat that he had a double chin. 他胖得有双下巴了。
- The carpet is too thick to double up. 这地毯太厚没法折叠。
- Is the material single width or double width? 这幅料子是单幅的还是双幅的？
- Reserve double room June fourth to tenth inclusive. 预订双人房间，六月四日至十日，共六晚，望订妥复电。
- In this case, I can double for penalty. 假如这样的话，我可以叫加倍了。
- Can you tell me the rate for a double room, please? 请告诉我一间双人房的费用可以吗？
- The soldiers came at the double. 士兵们是急行军来的。
- A couch performs a double service. 躺椅有双重的服务。
- Look, double yellow lines you mustn't park here. 喂，这是双黄线--不能在这儿停车。
- Please double up the chair and put it aside. 请把椅子折起来放在一边。
- For strong sewing use double, not single thread. 为了缝得牢，用双线，而不要用单线。
- Do you want a single room or a double room? 您要单人房还是双人房？
