1)be covered by ... : 由...承担/负担/支付;被...掩护/报道/监视/控制等等,表示抽象的概念, 后面接人, 机构, 或者组织.\x0dThese expenses are covered by the state.\x0d这些费用都由国家负担.\x0dAll road out of town has been covered by the police .\x0d所有出城的道路都被警察监视.\x0d2) be covered with ... : 被...覆盖,表示具体的覆盖.如被雪/草地/布/被子/盖子/罩子等东西盖住.\x0d家具上满是灰尘.