Herons Ardeidae, sparrows ( Passerinae ) and common magpies ( Corvidae ) are suggested as useful bioindicators of environmental pollution.建议选择野生鹭类 、 麻雀和喜鹊等鸟类作为指示生物监测环境中的重金属污染....
见解独到的人士要么被调往次要的岗位，要么就不被提升。Independent thinkers are shunted into minor jobs or refused promotion.那只不过是次要的因素。That is just a secondary consideration .上司把她降到较次要的职位.The boss demoted her to a less responsible position....