Heels not only have to be the right height but in the right position: not too far back, but under the centre of the heel so they support your weight properly, following the natural lineof your body.
When it became clear that the wealth being created on paper was out ofline with the real value of the homes themselves, the pyramid fell under its own weight.
当纸面的财富价值明显不符合住房实际价值时,金字塔被自己的重量压垮。
3
The next line says if the weightof i is greater than a w, well then I know I can't put it in.