OG39

板栗在奋斗

Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries.

• Ait is so debilitating that it has become an economic
• Bit is of such debilitation, it has become an economical
• Cso debilitating is it as to become an economic
• Dsuch is its debilitation, it becomes an economical
• Ethere is so much debilitation that it has become an economical