sub-convex

常见例句

I had to sub for the referee, who was sick.
裁判病了，我得代为裁判。
A convex surface, body, part, or line.
凸面、凸面体、凸面部分或凸线
The sub can outrun any destroyer.
这艘潜水艇比任何驱逐舰航行得都快。
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。
I have to sub on her for the new car I want to buy.
要买那辆新车，我得向她借点儿钱。
Clive Walker came on as a sub and starred.
克里夫-沃克替补上场，大放异彩。