- 1contract in (officially choose to join)（正式）選擇加入（方案）
To say officially, usually in writing, that you want to join a plan — a pension plan, an insurance plan. Very formal, mostly British paperwork English; in everyday life people now say 'opt in'. You may only ever meet it in reading tests.
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，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。
contract inverb
- 1
To hire and bring a contractor into a project locally.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。