1. 认识这个词（基础篇）
词：tentative
英英释义：not definite or certain, and may be changed later
例句：We made a tentative arrangement to meet on Friday.
2. 体会这个词 （进阶篇）
“tentative”是形容词，意思是“暂时的”“试探性的”，常常可以用来替换 uncertain/experimental，是口语和外刊中的常见实用词汇。我们通过几个例子掌握它的用法。
某一个计划、安排、结论只是暂时性的、初步的，就可以用 tentative：
The plan/arrangement/conclusion is only tentative.
我们平时常说的“暂定”就可以用 tentative，比如“我们暂定星期五见面”就可以说成：
We made a tentative arrangement to meet on Friday.
现在许多城市开始尝试性地利用面部识别技术管理交通：
Many cities are taking tentative steps to use facial-recognition technology to identify traffic violators.
《经济学人》中也经常用到 tentative：
1）For all the technology’s potential, though, most attempts to use it remain tentative. （这里的 it 指的是“区块链技术”）
2）International observers and NGOs have offered tentative support, saying a delayed poll would be better than a badly flawed one.
3）Similarly, in America, a tentative proposal to split air-traffic-control services from the FAA into a separate entity, as in the rest of the developed world, was last year grounded in Congress.
3. 从认识到会用（作业）
1）翻译下面的句子： 政府正在采取试探性措施来解决国家的经济问题。
（参考翻译：The government is taking tentative steps towards tackling the country's economic problems.）
2）结合自己的生活、学习、工作、兴趣等，想象在什么语境下会用到这个表达。先简要描述这个场景，再造句。
The tentative step brings more challenges.
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