keystone怎么读，keystone什么意思，keystone短语和例句

1.The keystone of success is hard work.

成功的基石在于努力工作。

2.Because complex species interactions may be involved, identifying a keystone species by removing the species and observing changes in the ecosystem is problematic.

由于其中可能涉及复杂的物种相互作用，通过移除一个关键物种并观察生态系统的变化来确定该物种是有问题的。

3.In architecture, a keystone in an archway or doorway is the stone that holds the whole thing together, and keeps it from collapsing.

建筑学中，拱道或门口的拱心石，是把建筑整体连接在一起来防止它倒塌的石头。

4.Keystone pipeline should be rejected because it is a signal to reduce fossil fuels.

译文重点输油管道项目应该被否决，因为这是减少化石燃料的信号。

5.Today mathematics is the keystone of high technology, and, in a sense, the symbol of modern civilization.

而今天，数学则是高技术的基础，并且在一定意义上可以说是现代文明的标志。

6.The proposed Keystone XL pipeline would carry heavier crude oil produced from tar sands in Canada.

计划中的大号拱心石石油管道将用于运输产自加拿大油沙的重原油。

7.The keystone. It will lead us to our final goal.

拱顶石！它将引导我们走向我们最终的目标。

8.He came to regret moving with his wife Elizabeth to New York in 1936, tempted by a job offer at the Keystone Agency.

在凯斯通公司提供职位的诱使下，他和妻子伊丽莎白于1936年移居纽约，这使他日后十分后悔。