您要查找的是不是：
- His figure looks very funny in the concave mirror. 他的样子在凹镜里显得非常可笑。
- An indented or concave surface or area. 凹陷，洼地凹的表面或地区
- Loosely, a mathematical or logic operator. 不严格地说，一种数学或逻辑运算符。
- That store operator ripped me off. 那个商店的营业员把我骗了。
- The operator told the caller that the line is busy. 接线生告诉打电话的人对方电话占线。
- 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。
- Ring the operator and ask for Freefone 8921. 接通接线生，然後要免费通话8921号。
- The intricate machine requires a skilled operator. 这种复杂精细的机器须由技能熟练的人操作。
- Be careful with him -- he's a cute operator. 对他你得留神,他是个精明圆滑的家夥。
- concave operator 凹算子
- u0 - concave operator u0-凹算子
- A concave molding with a cross section that approximates a quarter circle. 飞檐的凹圆线脚截面近于九十度弧的凹线脚
- A depression similar to that in a shallow concave container for food. 凹形，凹面与浅的凹型盛食物的容器相似的凹处
- Do you know the telegraph operator living over the way? 你认识住在路对面的那个报务员吗？
- The palm of one's hand is slightly concave. 人的手掌是微凹的。
- She is the local representative for a British tour operator. 她是一位英国旅游经营者的当地代表。
- A concave surface, structure, or line. 凹面、凹形结构、或凹线
- Concave on both surfaces;biconcave.Used of a lens. 双面均凹进的；双凹的。用于指透镜
- Concave on one side and convex on the other. 一面凹进一面凸起的
- Operator, we are cut off. Can you reconnect me, please? 接线员，我们的电话断了。请再给我接一下可以吗？
