underlineKK [ˋʌndɚˏlaɪn] /ˈʌndɚˌlaɪn/動詞1畫線、加底線She underlined the key words in red before the exam.考試前她用紅筆在關鍵字下面畫線。2強調、突顯、彰顯The accident underlines the need for stricter safety rules.這起事故凸顯了制定更嚴格安全規範的必要。名詞1底線、下畫線Add an underline to the title to make it stand out.在標題加上底線，讓它更醒目。