您要查找的是不是：
- There is a vein of melancholy in his character. 他的性格中有少许忧郁的气质。
- She helps her mother when she is in the vein. 她在心情好的时候会帮她妈妈的忙。
- A vein of gold was seen cropping out. 可以看见一条金矿矿脉露出地面。
- A convex surface, body, part, or line. 凸面、凸面体、凸面部分或凸线
- The central or principal vein of a leaf. 中脉中心的或主要的叶脉
- He had no comedy vein in his youth. 他年轻时没有演喜剧的才干。
- A rich mine, vein, or pocket of ore. 富矿脉富矿坑、脉、囊
- convex vein 凸脉
- She writes humorous songs when she is in the right vein. 她在心情不好的时候写诙谐的歌曲。
- Just as a double convex lens enlarges, so a double concave lens reduces. 正象双凸透镜可以放大那样，双凹透镜也可以缩小。
- Light can be collected with the convex. 凸透镜具有聚集光线的作用。
- The convex surfaces faces toward the left. 凸面朝左方。
- There is a vein of humor in his nature. 他天性略带幽默。
- A convex lens is used to concentrate rays of light. 凸透镜用于聚集光线。
- The girl is not in the vein for singing today. 那女孩今天没有心情唱歌。
- A stone tool with a convex side. 龟甲形石斧一边凸起的石制工具
- He speaks in a humorous and implicit vein. 他说话幽默含蓄。
- A deep - red garnet, unfaceted and convex. 红榴石一种深红色的石榴石，无刻面呈凸圆状
- Concave on one side and convex on the other. 一面凹进一面凸起的
- Convex on one side and concave on the other. 凸凹的一面凸一面凹的
