undefined

US /ˌʌndɪˈfaɪnd/

UK /ˌʌndɪˈfaɪnd/

B1 中級
adj.形容詞不明確的:未下定義的
The terms of the agreement were undefined until he wrote them down

影片字幕

要用 Between 或是 Among?

15:49要用 Between 或是 Among?