首先，我打开拍摄的源照片，这张照片主要是为分离人物和地面上影子而拍摄的(这里是说，作者需要一张易于扣取人物及其影子的照片——译者注)。

First off I opened the original image resulted from the shooting with the main purpose being isolating the character and the shadows on the floor.

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恶意软件正与日俱增(间图二)，其典型用途是偷盗密码和其他数据，或者打开电脑的“后门[注4]”以便入侵者控制。

Malware is exploding (see chart 2). It is typically used to steal passwords and other data, or to open a "back door" to a computer so that it can be taken over by outsiders.

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注：fopen中使用的“ r ”将指示文件以只读方式打开。

Note: the "r" used in fopen indicates that the file is open for reading only.

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