基础篇： to strengthen or support something from below
The report is underpinned by ample research. 这份报告是经过充分研究研究得出的
进阶篇：underpin 是动词，本义表示“用砖石结构等从下方支撑（建筑物）”， 常引申表示“巩固、支撑，构成...的基础”。underpin是一个灵活、高频、形象的表达，经常可以用来替换justify, support 等词。
我们常说先做人再做事，也就是说价值观是取得成功和幸福基础。
Our values underpin our long term success and happiness.
《经济学人》用例：
1） You might think that America's clout comes from its 11 aircraft-carriers, 6500 nuclear warheads or its anchor role in the IMF. But it is also the central node in the network that underpins globalization. (underpin 写出了美国在全球化中的位置)
2） American officials also made clear that they view Hxxx as a threat to national security, since it builds the telecoms networks that underpin modern societies.
3) The security of such systems is likely to be protected by blockchain, the technology that underpins cryptocurrencies like Bitcoin.
应用篇：
1） 翻译：他用详实的数据支撑了他的观点。
He presented solid data to underpin his argument.
2) 造句：这些法律和政策构成这个城市作为国际金融枢纽的基础。
These laws and policies underpin the city as an international financial hub.
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