本期内容：

When presidents embark on prestigious state visits abroad, in the past they were expected to leave their political disputes at home and put on a friendly face for n hosting them. But when President Trump arrived in London on Monday for a long-delayed state visit to Britain, he ignored both customs. Circling back to a long feud with Sadiq Khan, London's first Muslim mayor and a vocal critic of Trump, the president tweeted: "@SadiqKhan, who by all accounts has done a terrible job as Mayor of London, has been foolishly 'nasty' to the visiting President of the United States, by far the most important ally of the United Kingdom."

embark on: 开始做某事（start/begin）
He embarked on a new career as a teacher.
他开启了一项新职业即做老师。
prestigious: adj. 有名望的；享有声望的
put on假装；做作（pretend）
He put on an American accent.
他假装美国口音。
long-delayed: 拖延已久的
feud: n. 夙怨，积怨已深
vocal critic: 直言不讳的批评（家）
She was a vocal critic of the plan.
她直言不讳地反对这项计划。
by all accounts: 根据各方面所说；大家都说
Mr. Xia is, by all accounts, a superb teacher.
夏老师是一位有口皆碑的老师。

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