It is often said that an American starts a speech with a joke,while a Japanese has an aplogy to makwhile 在这里起到转折作用,引导的是什么从句?

It is often said that an American starts a speech with a joke,while a Japanese has an aplogy to makwhile 在这里起到转折作用,引导的是什么从句?
It is often said that an American starts a speech with a joke,while a Japanese has an aplogy to mak
while 在这里起到转折作用,引导的是什么从句?

It is often said that an American starts a speech with a joke,while a Japanese has an aplogy to makwhile 在这里起到转折作用,引导的是什么从句?
while 这里是转折连词,引导的不是从句.
整个句子是个主语从句,while a Japanese has an aplogy to mak
和an American starts a speech with a joke并列,同作整个句子的实际主语,

据说美国人是以笑话开始演讲的，而日本人则是以道歉开始 。