Sys is a logical field that can be either yes or no.
Sys是一个逻辑字段，其值可以为真或假。
Adopting this plan, it needs not to change beamwidth and there needs no common optical sys-tem for receiving and transmitting.
此方案无须要求通信系统具有能实现宽窄波束变换的光学系统，也不用预先解决收发天线共用的问题。
For a city, although no ISO9000 quality certification system exists by now, but we can absorb some ideas from such a sys - tem to strengthen city administration and enhance city quality.
对于一座城市，可以吸取ISO 9000质量体系的思想，加强城市管理，提高城市品质。
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