know of
听说过
knowledge ['nɔlidʒ]
n.知识；熟悉，了解
keep one's distance
保持距离，尽量远离
keep an eye on
留意，照看
keep one's fingers crossed
祈求好运
keep one's head
保持镇静
know sth. by heart
记住，背下来
kangaroo [,kæŋɡə'ru:]
n.袋鼠
keen [ki:n]
a.锋利的；敏锐的；强烈的；渴望的
keep [ki:p]
v.保留；保持；遵守；饲养；管理
keep back
隐瞒，保留；阻止，阻挡
keep down
压制，镇压；放低，压低
keep off
不接近，使避开
keep on
继续，反复
keep out of
使避开
keep to
遵守，信守；坚持
keep up
坚持，保持；使继续下去
keep up with
跟上
keeper ['ki:pə]
n.看守者；管理者，保管员
kerosene ['kerəsi:n]
n.煤油
