upward reaction的意思|示意

The melt extracted a mass of metallic elements gold and silver during its reaction with mantle peridotite when it migrated upward to the mantle wedge;

熔体与地幔楔橄榄岩及幔源熔体的相互作用（金属的萃取）使熔体富集成矿元素；

A more severe retracement of 62%, also a common reaction to a big, fast move upward, would still take the market down just 175 points, to about 775, still well above the March low.

即使跌幅达到62%，也是对一次大而快的上涨的正常反应，哪怕下跌175点到了775的点位，也还是比3月份的低点要高。