By doing so, there is no need to restore the data into a live database, which provides greater flexibility and saves time and cost on resources to restore the data to a database.
完成这些步骤之后，就不必将数据存储到活动数据库中，从而提供更大的灵活性，并且节省了将数据储存到数据库所需的时间和资源成本。
This saves the time and memory cost of constructing a String from the rope, which, for large ropes, is enormous.
这样就节省了用rope构建String的时间和内存开支，对于大型rope来说，这种开支是相当巨大的。
Two-dimensional simulations are performed in comparison of schemes, which saves a lot of time and decreases the computing cost.
在多方案比较时，采用二维模拟的方法，节省了计算时间，降低了计算成本。
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