[句型解析]
“no wonder...”意思是“難怪；不足為怪”，當我們弄清楚了某件事的原由，便不會對此感到奇怪，經常會來一句“難怪……”，后加“that”從句，“that”也可省略。“Small wonder...”“Little wonder...”表達的也是相似的意思。

[實例]
1. You eat so little. No wonder you are so slim.
你吃得這么少，難怪這么瘦。
2. Are you a librarian? No wonder you are so well read.
你是圖書管理員？難怪這么博學。
3. There is something wrong with your leg? No wonder you walk so slowly.
你的腿出問題了？難怪你走得這么慢。

keep your hair on 你冷靜一下

“冷靜”的表達：

keep one's shirt/wig/hair on
Keep your shirt on. He didn't mean to offend you. That's just the way he talks.
冷靜一下，他不是有意冒犯你的，他一直都是這樣的說話方式. ( ╮(╯▽╰)╭ 有的人確實就是這樣滴...林子大了...咳咳...)

接下去的兩個就是 Keep your wig on! / Keep your hair on! 一樣的架構. 直接這樣用就行了，造句的話：
I hope you'll keep your hair on with me for the things I am gonna talk. 接下去我要說的內容希望你能夠冷靜不要對我發火。

keep up with 后面一般接名詞
1. 跟上
They walked so fast that I could not keep up with them.
他們走得那么快,我沒法跟上。
2. 和...保持聯系
She has kept up with some of her friends since her retirement.
她退休后一直同一些朋友保持著聯系。