這個拼法底下其實是2個不同的字，意思沒有關係， 只是長得一樣。下面分開列出來。跳到 open out (become wider) · open out (unfold to full size)
1
open out
A second word, same spelling
2
open out
原始詞典資料3 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。
open outverb
- 1
To expand, to widen, to unwrap, unfold or uncover, to spread out from a compact state.
- Once though the station the deep-throated exhaust of G.C.R. engines, and particularly the "Directors", could be heard in ascending crescendo as the drivers opened out to take the gradient.
- To obtain the required overhead clearance at Stockport, it will be necessary to open out the Edgeley tunnels.
- 2
To facilitate wider access or expand options.
- The plan will open out the region for trade.
- 3
To increase the amount of air in an engine, such as by pressing on the accelerator to open a throttle plate or butterfly valve.
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。