eg：The umbrella can protect people from the rain.雨伞可以保护人们不受雨淋。

　　122、sb be engaged in doing sth 忙于做某事

　　123、fail in sth/fail to do sth 失败于某事

　　124、indulge oneself in sth/doing sth 沉溺于某事

　　eg：He indulged himself in traveling all over the world.他沉溺于他的环球旅行。

　　125、sb be involved in sth 某人被牵涉进某事中

　　eg：I don't want to be involved in their quarrel.我不想搅和进他们的争吵中。

　　126、concentrate on sth/doing sth 全神贯注做某事

　　127、decide on sth 决定

　　eg：They have decided on the date for their outing.他们已经决定了出游的日期。

　　128、economize on sth 节约

　　eg：We should economize on all kinds of energy.我们应该节约各种能源。

　　129、embark on sth 开始着手做某事

　　130、operate on sb 给某人动手术