keystone是什么意思音标:英 ['ki:stəʊn]美 [ˈkiˌston]

n. 拱顶石, 楔石, 重点

n. the central building block at the top of an arch or vault

keystone的用法和例句：

1.What you tried, a keystone cop would have spotted.

你之前的手法 是个警察都能看出来

2.Just deapng with some middle eastern keystone cops out at the gate.

刚在大门那儿处理一些 不开窍的中东警察的事儿

3.However, a thorough examination led me to what I'm calpng the keystone of my diagnosis.

然而 全面的检查让我 找到了诊断的核心所在

4.If we don't act now, I bepeve that we will lose many keystone species, such as the orangutan.

现在不行动的话 我们就会失去 很多重要物种 比如大猩猩