重點講解：
1. in reality
事實上；實際上；
eg. He came across as streetwise, but in reality he was not.
他給人的印象是很適應都市生活，但實際上并非如此。
eg. Outwardly she looked confident but in reality she felt extremely nervous.
表面上她顯得很自信，其實她非常緊張。
2. for real
真實地；真正地；不是假裝；
eg. This isn't a practice game; we're playing for real.
這可不是練習；我們是在認真地比賽。
eg. I don't think her tears were for real.
我認為她的眼淚不是真的。
3. out of the blue
突然；出乎意料地；
eg. One of them wrote to us out of the blue several years later.
數年后他們中的一人突然給我們寫了一封信。
eg. The news was a great shock to me; it came absolutely out of the blue.
這個消息，對我是一個很大的打擊，簡直太突如其來了。
4. go about
文中是【航】掉轉船頭的意思；
eg. The captain ordered them to go about.
船長命令他們調轉船頭。
eg. As soon as he heard the cry "man overboard", he ordered the ship to go about and search for the missing man.
他一聽到有人喊“有人落海”，他立即下令船轉向，搜尋失蹤的人。