Likewise, it's not especially effective to apply pressure straight from the top or bottom when trying to squeeze water from a wet towel. The best method is twisting (rotating) it. If the angle is right, and you apply a little force intelligently, you can squeeze out the last drop. This is akin to how the "silk reeling energy" of tai chi is applied.
同樣的，要擠一條濕毛巾，直上直下用力壓是沒有用的，最好的方式仍然是扭轉，只要角度對了，加上一點巧力，可以輕鬆擰擠出最後一滴水，這也就是太極的「纏絲勁」。