A perennial is a plant that lives indefinitely.多年生植物是指能存活很多年的植物。the perennial problem of water shortage缺水这个老问题I wonder at her perennial youthfulness.我对她青春常驻感到惊讶....
John F . Kennedy typified the new frontier spirit.约翰. 肯尼迪为新拓荒者精神的典型人物.He thus typified the constant introspection wherewith he tortured, but could not purify himself.他就这样不断地自省,其实只是在自我折磨, 丝毫得不到自我净化.Blues are the Water Ele...
Hormone replacement therapy is very important and should be instituted early.激素替代治疗非常重要，应该及早开始。Replacement parts couldn't be found for love or money.替换零件怎么都找不到。Sending a replacement jet would have been uneconomic.当时...