从时间同步着手，分析了时间同步技术—网络时间协议（NTP）和直接连接时间技术，比较了几种分布式系统的时间同步化策略。

The technology of time synchronization including Network Time Protocol(NTP) and Direct time Connection are analyzed, and some time synchronization strategies of distributing systems are compared.

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通过对内切酶用量、酶切时间、连接时间、稀释倍数等的研究，建立了适于核桃分析的AFLP银染技术体系。

After systematically study on the main factors involved, an AFLP silver-staining analysis system suitable for walnut genomic DNA was established.

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