lay down
1． resign辞职
The old man has laid down his office to make way for a younger man．这位老人为了给年轻人让位，辞去了他的职务。
2．store away for future use贮藏
They laid down provisions for the voyage．他们贮备粮食以备航行之用。
He has laid down some excellent vintoges．他贮藏了非常好的葡萄酒。
3．cease using放下
Please lay down the watch gently．请把手表轻轻放下。
Tell your men to lay down their armsthe war is over．告诉你们的人投降吧，战争已经结束了。
4．sacrifice牺牲
He laid down his life for the country．他为国牺牲。
Thousands of young men laid down their lives for the cause of peace．成千上万的年轻人为了和平事业献出了自己的生命。
5．state clearly and definitely明确规定
It is laid down that no changes can be made after a committee decision．按规定，委员会决定后不能再做任何修改。
The school authorities have laid down some new rules．学校当局制订了一些新的规章制度。
The Act lays it down that no pension can be paid to anyone under the age of sixty unless he is disabled．法令规定，除残废者外，60岁以下者，不得领取养老金。
6．bet下赌注
How much is Martin ready to lay down on the horse？马丁打算在这匹马上下多少赌注？
7．construct；build建造
They are laying down a nuclear submarine．他们正在建造一艘核潜艇。
Several of the newtype tankers are being laid down．有几艘新型油船正在建造之中。
The track was laid down in the 19th century and is in need of repair．这条铁路是19世纪铺设的，急需整修。
Many new railways have been laid down in the past few years．几年来建造了许多新铁路。
8．plant or sow（a field） with a certain crop； convert（land） into pasture在（耕地上）种上；把（耕地）改成牧场
This year we must lay the big field down to grass．今年我们必须把这块大田改种牧草。