模仿句子：But let's start with President Obama in London. The main focus of coverage of his visit to Britain, apart from his lunch with Queen Elizabeth,  has been his entry into the debate over Brexit.

翻译：首先来看奥巴马伦敦之行方面的消息。奥巴马此次到访伦敦，媒体报道的重点除了其与伊丽莎白女皇的午宴，就是奥巴马在英国是否应退出欧盟问题上的立场。