文中分析了嘉陵江流域洪灾具有普遍性 、 频繁性 、 季节性 、 破坏性、复合性的特点.He holds that the Jialing River Basin's flood has five characteristics: universality, frequency, seasonality, destructiveness and complexity....
I'm a blood donor; I can't risk any contagion.我是献血者，我不能冒任何接触传染的危险。The marrow donor is her 14-month-old sister.骨髓捐献者是她14个月大的妹妹。AID or artificial insemination by a donor他精人工授精...