地方性氟中毒病区控制标准: control standard for endemic fluorosis area
活跃: 1.(活泼而积极; 蓬勃热烈) brisk; active; dynamic; lively 短语和例子市场相当活跃。 the market is quite lively. 会议那时正开得很活跃。 the meeting was then at its liveliness. 宴会开始活跃起来。 the party began to warm up.2.(使活跃) enl
