The idea behind defense in depth is simple: Never rely on just one security method.
深度防御背后的理念很简单：永远不要仅依赖于一种安全方法。
The idea behind One Foundation is simple: think big by thinking small.
壹基金的想法很简单：化大为小。
This is a simple idea, but one which is hard to put into practice.
这是一个简单的想法，不过也是一个难于付诸实践的理念。
Incredibly, no one had ever thought of such a simple idea before.
真是难以置信，这样简单的主意竟然没有人想到。
Special English is written in short, simple sentences that contain only one idea.
特别是英语书面包括只要一个想法，总之，复杂的句子。
Special English is written in short, simple sentences that contain only one idea.
特别是英语书面包括只要一个想法，总之，复杂的句子。
应用推荐