priceless 无价的，极重要的，珍贵的

【高清课堂B2U1重点词句】

survive

【原句回放】Is it enough to have survived for a long time? 留存很长时间久足够了吗？

【点拨】survive vt. vi. 幸存，生还; 活得比某人长；比某人长寿

Of the six people in the plane that crashed, only one survived.

在这次空难的六人中，只有一个人幸存。

I don't know how you all manage to survive on Jeremy's salary.

我不知道仅靠Jeremy的薪水，你们是怎么度日的。

Several buildings in the town have survived from medieval times.

这个镇上的一些建筑从中世纪一直延续到现在。

The plants may not survive the frost. 这些植物可能熬不过这次霜冻。

The old lady has survived all her children. 这个老太太活得比她所有的儿女都长。

【拓展】survivor n. 幸存者

survival n. 幸存

surviving adj. 活着的，残存的

survival of the fittest 适者生存

doubt

【原句回放】There is no doubt that the boxes were then put on a train for Kónigsberg, at that time a German city on the Baltic Sea. 毫无疑问，这些箱子后来被装上火车运往哥尼斯堡，当时它是波罗的海边的一个德国城市。

【点拨】doubt [c]n. [u] n. 怀疑，不信, 在肯定句中常接whether / if 从句，在否定句中常接 that 从句：

Elizabeth had no doubts at all about her ability to do the job.

伊丽莎白做这个工作的能力是没有疑问的。

The incident raises doubts about the safety of nuclear power.

这次事故引起了对核能源的安全性的疑问。

The meeting will provide people with an opportunity to voice any doubts they may have about the proposals.

这次会议给人们提供了一个机会，他们可以表达对这些建议的任何疑问。

There is an element of doubt as to whether the deaths were accidental.

对于这些死亡是否意外，有一些怀疑的要素。

There is no doubt ... ......是毫无疑问的。

There's no doubt that one day a cure will be found.