商业上

Excretory system by metanephric kidney; ureters open into cloaca; no bladder; semisolid urine; uric acid main nitrogenous waste

9排泄系统是后肾；输尿管开口于泄殖腔；无膀胱；尿半固体；尿酸是主要的含氮废物。

There is always a conflict between the burdensome building tasks and the shortage of building funds during our nations economy-developing period. As a newly-emerging mode of project financing charactering making use of private capitals to build up our infrastructure, BOT provides an effective method of alleviating this conflict.

由于我国经济发展中长期存在着建设任务繁重、建设资金不足的矛盾，BOT作为一种利用私人资本建设基础设施的灵活可行的新型项目融资方式，为解决这一矛盾提供了有效途径。