adv. 通常,經常,平常,慣常地;一直,向來;動不動,一般;素;
?? usual通常的+ly副詞后綴→通常地,慣常地
"The discovery of distillation is usually accredited to the Arabs of the 11th century."
通常認為,蒸餾法是阿拉伯人在11世紀發明的。
近義:invariably, mostly, normally, oft, often, oftentimes
反義:infrequently, occasionally, seldom, sometimes