adj.通常的,常有的,常见的;平常的,普通的;平时的,平日的;一向的,老是那一套的;
例句:
It is usual to start a speech by thanking everybody for coming.
讲话前先感谢大家光临,这是惯例。
As usual, they'd left the children at home with Susan.
像往常一样,他们把孩子留在家里,让苏珊带。
She sat in her usual seat at the back.
她坐在后排平时惯坐的位子上。