4周搞定2000+托福核心词
invariable
常考释义
adj. 不变的;恒定的;始终如一的
It was a usual though not invariable practice.
虽然不能说是一贯做法,但这种做法的确很通行。
It was his invariable custom to have one whisky before his supper.
晚餐前喝杯威士忌是他一直以来的习惯。
n. 常量;常数【数】
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