1.ask for 请求；索取

That was Nicholas's cue to ask for another chocolate chip cookie.
那表示尼古拉斯还想要一块巧克力曲奇。

I decided to go to the next house and ask for food.
我决定去隔壁那家要点吃的。

2.no doubt 无疑地；毫无疑问

They have the usual quota of human weaknesses, no doubt.
毫无疑问，他们身上也有人所共有的弱点。

There was no doubt in his mind that the man was serious.
在他看来，这个人无疑是认真的。