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词汇
obligatory
释义
obligatory
/əˈblɪgətri;
US
-tɔ:rɪ
||
; əˈblɪgəˌtɔrɪ/
adj
(
formal
正式) that you must do 必须做的;义务的:
It is obligatory to get insurance before you drive a car.
驾驶汽车之前必须购买保险。
[OPP]
optional
反义词为
optional
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更新时间:2025/4/16 17:21:18