1.keen on 热衷于,对…着迷,再爱
例句：Mary is very keen on etching.
玛丽很喜爱蚀刻艺术。
2.keep up (使）继续下去，（使）不停，坚持，保持(使）保持良好状态
例句：Keep up the struggle till you succeed.
继续战斗直到你们取得胜利。
3.keep sth. quiet (keep quiet about sth.) 将某事保密
例句：I'll brain you if you don't keep quiet.
如果你不保持安静的话，我就敲你的脑袋。
4.keep a secret 保守秘密
例句：“Can I trust you to keep a secret?” she asks.
“我可以相信你能替我保守秘密吗？” 她问？
5.keep abreast of (或with) 与…齐头并进，(使）不落后于
例句：That way, you can keep abreast of emerging issues and concerns.
这样，你就可以跟得上新问题的发生与进展。
6.keep an eye on 照看，留神，密切注意
例句：Rogers believes global surveillance for influenza outbreaks should keep an eye on Arctic ice.
罗杰斯认为，全球对流感爆发的监测应该留意北极冰河。