travel bubble
原始詞典資料1 筆記錄
這個字我們還沒有寫成教學內容。以下是外部詞典記錄的用法，原文照列，方便你先看懂它的意思。
travel bubblenoun
- 1
An arrangement between two (or more) countries, states, or other administrative regions, that allows free travel of residents between them while otherwise keeping their borders closed to travellers from outside the bubble.
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。