最后我知道当我们承诺东西，我们只相信尽力知道它，但如果事情更改，我们可能做不理。
At last I know that when we promise something, we just believe we will try our best to realize it, but if things change, we may do nothing about it.
在20世纪初，很少有东西比科学知识的承诺更吸引人的了。
In the early 20th century, few things were more appealing than the promise of scientific knowledge.
动词 tantalize 的意思非常特殊：“承诺或展示某人想要的东西，然后把它拿走；通过唤起希望来挑逗。”
The meaning of the verb tantalize is a very particular one, "to promise or show something desirable to a person and then take it away; to tease by arousing hope."
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