下降

descend;go (or come)down;drop;fall;decline;plummet
飞机正在～。The plane is descending./价格平均～10%。Prices dropped 10% on an average./气温明显～。There is a marked drop in the temperature./生产成本逐年～。Production costs come down every year./生产日益～。Production is going downhill day by day./士气～。Morale sinks lower./他的地位～了。He was demoted./威信～lower the prestige of sb;prestige declining/生活水平～become worse off; have a lower standard of living;lower the standard of living/质量～the quality is declining;poorer quality/出生率～a decline in the birth rate/～为次要地位be relegated to a secondary position