低足 meaning in Chinese

teisoku arch of the footot

Pronators often have flat feet , and the medial portion of their shoe bottom wears down before the lateral part
低足弓脚通常有扁平的脚，鞋底的内侧比外侧更先磨损。
Not only are the markets in a deep funk , with volume low enough to make a grown stockbroker cry , but pessimism so profoundly pervades the ranks of professional advisors that skeptical contrarians are beginning to think that the next major surprise could well be to the upside
不但股票市场大不景气，成交额之低足使一个老到的经纪人落泪，而且悲观气氛深深弥漫于专业投资顾问之间，以至抱怀疑态度唱反调的人开始认为：下一个令人惊奇的事很可能是情形好转。