Britain used to be the most powerful country in the world.
英国曾是这个世界上最厉害的国家。


The politician gave a powerful speech.
这位政客做了有力的演讲。


The trees and houses were blown away by the powerful typhoon.
树木和房子都被强劲的台风吹走了。


This powerful man's political ambition was to unify the three kingdoms.
作为一个有权势的男人，他的政治雄心是一统三国。

It is a powerful nation.

它是个强国。

※Truth and love are two of the most powerful things in the world; and when they both go together they cannot easily be withstood. 真理和爱情是世界上力量最强大的两样东西，当它们两者走在一起时，它们是很难抵挡的。
※A powerful idea commissions some of its strength to him who challenges it.——Marcle Proust, French writer  权威的思想将它的某些力量赋予敢于向它挑战的人。法国作家 普鲁斯特.M.