The secrecy policy causes search engine technology to remain largely a black art and to be advertising oriented.
保密政策使得搜索引擎技术在一定程度上保留着它神秘的面纱，并且面向广告。
Business secrets refer to the practical information of technology and operation unknown to the public on which the obligee takes secrecy measures and which can bring economic benefits to the obligee.
商业秘密是指不为公众所知悉、能为权利人带来经济利益、具有实用性并经权利人采取保密措施的技术信息和经营信息。
The exploitation technology of electrical control unit is key technology electrical control system, it is secrecy, the open datum is very rarely.
电控单元的软硬件开发技术作为电控系统开发的关键技术，被严格保密，公开的资料很少。
Besides, the signal ling USES the CDMA technology, so its secrecy was extremely enhanced.
此外，由于信号传输采用码分多址技术(CDMA)，保密性极高。
Besides, the signal ling USES the CDMA technology, so its secrecy was extremely enhanced.
此外，由于信号传输采用码分多址技术(CDMA)，保密性极高。
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