adj. 基本的;[化学]碱性的;[地质学]基性的;首要的;
n. 基础,基本;基本原则,基本原理,基本规律;要素;基础训练;
bas=basis基础+ic形容词,...的 →基本的
🗣️ 情景例句
It's OK, lady. Take your time.
没关系, 太太。慢慢来。
I don't know the exact date.
我不知道确切的日子。
But here we come up against the most difficult of all obstacles to contact with people on other planets ----the astronomical distances which separate us.