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 dealing 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 calling 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 believe 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

以上参考资料就是本英汉词典详细汇总的单词keystone的翻译英语含义，如有错漏请向我们提供反馈意见。