特朗普与外国领导人交往的规则很明确：他可以肆意贬低你。但如果你反击，那可就麻烦了。乌克兰的弗拉基米尔·泽连斯基对此再清楚不过了。
The rules of the road when it comes to Trump’s relations with foreign leaders are clear: He may trash you. But woe unto you if you whack back. No one knows that better than Ukraine's Volodymyr Zelensky.
最近与乌克兰总统弗拉基米尔·泽连斯基之间的分歧再次表明，特朗普总是轻易地攻击其他世界领导人，然而一旦对方反击，他就会勃然大怒。
The latest rift with President Volodymyr Zelensky of Ukraine serves as a reminder that President Trump readily lashes out at other world leaders, only to grow outraged if they fight back.