EF English app關於「EF login」標籤，搜尋引擎有相關的訊息討論：
登入帳號 - EF English Liveenglishlive.ef.com › zh-tw › loginLog in to your account | EF English Liveenglishlive.ef.com › en-gb › loginEF Parеnts - Apps on Google Playplay.google.com › store › apps › details › gl=USEF Education First on Twitter: "Learning a new language is a ...twit