Code not difficult, mainly to learn FTP file transfer and manipulation.
代码没有什么难度，主要是为了学习FTP传输和文件操控。
That's not too difficult to do, but the implementation code becomes fairly complex.
这并不太难做到，但是实现代码将变得相当复杂。
Not only is that process slow, but the code is also difficult to understand and maintain.
该过程不仅速度慢，而且代码也难于理解和维护。
When the source code is not available, it's even more difficult.
当源代码不可用时，回溯变得更加困难。
代码并不难。
代码并不难。
应用推荐