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1·At the city of Coba the Maya built dikes around a lake in order to raise its level and make their water supply more reliable.

在科巴市，玛雅人围绕着一个湖泊修建堤坝，以提高水位，使供水更加稳定可靠。

2·The solution is given about the implementation for the COBA-based. distributed object applications according to an example.

并就一个实例给出了基于CORBA的分布式对象应用的解决方案。