Keep thing seven years and you will find a use for it. 备而不用。
Keep good men company, and you shall be of the number. 近朱者赤。
Keeping is harder than winning. 创业不易，守业更难。
Keep some till more come. 更多的到手以前，要保持手里的一点。
Keep your breath to cool your porridge. 少管闲事。
Keep your eyes wide open before marriage, and half shut afterwards. 婚前张开眼，婚后半闭月。
Keep your mouth shut and your eyes open. 要多看少说。
Kill the goose that laid the golden egg. 杀鸡取蛋
Kind hearts are more than coronets. 善良的心灵胜于显贵的地位。
Kindness always begets kindness. 善有善根。
Kindness is the golden chain by which society is bound together. 善良是连结社会的金链。
Kindness is the language that the deaf can hear and the dumb understand. 善良为语言，聋子能天见哑巴懂心间。
Kindness is the sunshine of social life. 仁慈是社会生活中的阳光。
Kindness will creep where it may not go. 仁慈可进入任何禁地。
Kind words are the music of the world. 善言是世上的音乐。
Kind words are worth much and cost little. 口头方便不费力。
Kind words butter no parsnips. 画饼充饥。
Kinsman helps kinsman, but woe to him that hath nothing. 亲帮亲，邻帮邻，无亲无助你倒霉。
Knavery may serve, but honestyis best. 欺诈可能得计，但诚实总是上策。
Knowledge advances by steps not by leaps. 知识的获得是循序渐进而不是突飞猛进的。
Knowledge comes from experience alone. 知识来自经验。
Knowledge is a comfortable and necessary retreat and shelter for us in an advanced age; and if we do not plant it when young, it will give us no shade when we grow old. 学识可使老年时舒适地退隐和有所寄托；但如果年青时不使它扎下根，老年就得不到它的庇护。
Knowledge is a treasure, but practice is the key to it. 知识是一座宝库，实践是打开宝库的钥匙。
Knowledge is long, life is short. 吾生有涯，而知无涯。
Knowledge is of two kinds, we know a subject ourselves, or we know where we can find information upon it.
知识有两种，一种是我们自己知道的东西，另一种是知道哪里可以找到有关的资料。
Knowledge is power. 知识就是力量。
Knowledge is the antidote to fear. 知识可以解除恐惧。
Knowledge is the most precious treasure of all things, because it can never be given away, nor stolen nor consumed. 知识是万物中最珍贵的财宝，丢不掉，偷不走，也不会损耗。
Knowledge makes humble; ignorance makes proud. 知识令人谦虚；无知使人骄傲。
Knowledge will not be aquired without pain and application. 不花力气，不下功夫是得不到知识的。
Knowledge without practice makes but half an artist. 只有知识而无实践，只能造就半瓢水的艺术家。
Know something like the palm of one's hand. 熟知其事，了如指掌。
Know something of everything and everything of something. 既要有一般常识，又要有专业知识。
Know thyself. 知道你自己。