In many of these contexts, you start with multi-megabyte data sources, so making them several times larger can be inconvenient, especially for transmission purposes.
在许多这样的环境中，您要从数兆字节的数据源文件着手，因此若将它们增加几倍会引起不便，尤其对于传输用途。
Making these multiples larger can be inconvenient, especially for transmission purposes.
使这些文件增大几倍会带来不便，特别是用于传输目的。
However, this system is very flawed. Generally, the special PT is relatively large, expensive and inconvenient to install, especially in the high-voltage transmission lines.
然而，这种系统存在很大的缺陷，即专用PT一般体积比较大、价格昂贵并且安装不便，特别是高压输电线在正常运行时无法安装。
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