事情正在進行
把船的畫面借給抽象的事：計畫、調查、工程一旦「離開碼頭」，就進入了同一種狀態——開始了、還在動、尚未到站。
in progress · adjective · B2
Happening now; already started and still going on.
進行中
核心畫面
Picture a ship that has left the dock: the ropes are off, the water is moving past the hull, and it is on its way. Take that image off the water and any process can be underway — begun, moving, not finished.
可以想成：一艘船離開碼頭之後的樣子——繩子解開了，水從船身旁流過去，它已經在路上了。把這個畫面從海上搬走，任何一件事…更多收起
可以想成：一艘船離開碼頭之後的樣子——繩子解開了，水從船身旁流過去，它已經在路上了。把這個畫面從海上搬走，任何一件事都可以是 underway：已經開始、正在走、還沒結束。From the picture
Also in this word
moving (boat/train) · adjective · C1
If a boat or train is underway, it is moving.
航行中；行進中
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
underwayadv詞源 1/ʌndəˈweɪ/
- 1
In motion, in progress; being done or carried out; on a journey.
- The next wave, well underway, is shipping back-office business tasks overseas, ...
- The political world might still be recovering from the 2016 presidential election and focusing now on the midterm fights for Congress, but here in the nation's first primary state the battle for 2020 is already well underway.
underwaynoun詞源 2/ˈʌndə(ɹ)weɪ/
- 1
A road, track, path, or street for going under another way or obstacle; an underpass.
- As Minneapolis grew, the city demanded that M&StL construct "underways" beneath city roadways.
- 2
An underground passage, subway, tunnel.
- There are in fact many such subterranean underways in Germany, speeding traffic beneath bergs, burgs and villages and into and around and under big city downtowns ...
- 3
A voyage, especially underwater.
- I had been the diving officer on three previous submarines, …, and was an experienced officer of the deck with many underways and landings under my belt on all three.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。