对于客户机和服务器端的web应用程序开发人员来说，另一个主要问题是在本地复制运行时环境以便执行测试。
Another major problem for web application developers for both the client and server side is duplicating the run time environment locally for your own testing purposes.
对于双链DNA分子中的一条，出现了一个问题，那就是此链的末端无法被复制。
For one of the two DNA strands, a problem exists in that the very end of the strand cannot be copied.
译文：考虑到时间和费用的问题，复制品将只会有原型的一半大。另外，由于对于缩放比例的不确定和紧迫的时间表，复制品的接缝将由人工合成材料制成。
It was decided to make the replica half-scale for reasons of cost and time, and synthetic materials were used for the stitching, owing to doubts about the scaling and tight timetable.
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