Access - Virtual applications can be installed on demand from central locations that provide failover and replication.

获取——虚拟程序可于集中位置随需而装，并提供故障转移与复制备份的功能。

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This is in contrast to data replication, which moves a much smaller set of data, as it is going to central or distributed locations in a more automatic fashion.

数据复制移动的数据集就小很多，可以更自动化的方式移动到集中的或是分散的位置。

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Baculovirus expression system (BES) is one of the most important expression systems. Baculovirus also has potential ability as pesticide. DNA replication is the central step in its life cycle.

综述了与杆状病毒DNA复制相关基因的研究进展。杆状病毒表达系统是最重要的四大基因工程表达系统之一，杆状病毒还具有作为生物杀虫剂的潜能。

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