There was a sudden knock on the door, then he lost his train of thought.

突然而来的敲门声打断了他的思绪。

youdao

A feeling of sudden anger came over him - he was a fool to have thought she would come.

突然他觉得有点生气——自己怎么那么蠢，居然真以为她会来。

youdao

He felt a sudden rush of panic at the thought.

想到这点，他突然感到一阵强烈的恐慌。

youdao

And all of a sudden he started singing and I thought "wow!"

BBC: Obituary: The Troggs' Reg Presley

Also speaking on Newsnight Scotland, Harry Reid, former editor of the Herald newspaper, who is currently writing a book about Scotland's relationship with religion, said he thought the cardinal's "sudden departure" would "leave a gap" in the Catholic Church in Scotland.

BBC: Cardinal Keith O'Brien 'right' to resign ahead of conclave

And if you think back, historically, people like Muskee, when, you know, Muskee was in New Hampshire, who I thought he was going to win big, then all of a sudden, people realized the guy has got a little bit of a temper.

NPR: Week in Review: Primaries Play Leapfrog