【释义】当商品价格高涨时,要像对待粪土一样迅速出售;当商品价格低廉时,要像对待珠玉一样大量购入。
It has been said that man is a rational animal. All my life I have been searching for evidence which could support this.
在距离与重量成反比的情况下,物体处于平衡状态。