但是希望这些可以使人们对那些难于启齿的暴力行为采取行动。
But the hope is that they will influence people to take action against a form of violence that many find difficult to talk about.
几年前人们设计了一台能在难于行走的地面上行动并能短距离飞行的交通工具。
A vehicle was devised a few years ago which permitted movement over difficult land and could fly for a short distance.
在统一行动上，欧洲的国家情况有太多的不一致，在强国都难于自保的时候，他们不会去向弱国伸出援手。
There is too much disparity of national conditions in Europe for unity of action. Stronger countries cannot carry weaker countries on their back when they can hardly walk themselves.
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