derease:使大小`数量等减少,减小,降低EG:the number of new students decreased from 210 to 160 this year.reduce:1.减小,缩小尺寸,数量,价格等:Reduce the speed.2.减轻体重,节食:a readucing plan:节食计划词组:reduce sb or sth to sth orto doing:使陷入境地,使沦落其余的详见牛津大字典