usually ['juʒuəli] 词频1 词根: 使用

adv. 通常，经常，平常，惯常地;一直，向来;动不动，一般;素;

💡 usual通常的+ly副词后缀→通常地，惯常地

"The discovery of distillation is usually accredited to the Arabs of the 11th century."

近义：invariably, mostly, normally, oft, often, oftentimes 反义：infrequently, occasionally, seldom, sometimes

arithmetic [ə'rɪθmətɪk] 词频4 词根: arithmet

n. 算术，计算;算法;

💡 arith数学+met+ic...术 →算术

"He's not very good at arithmetic."

近义：mathematics, maths

Sunday ['sʌnde] 词频1

n. 星期日，星期天;每逢星期日出版的报纸;星期日报;[人名] 森迪;

💡 Sun日+day天→星期日

"She contrived to spend a couple of hours with him every Sunday evening."

近义：dominical