咕哝一声代表可能要出问题了。有时候会发生紧急情况，你需要尽快交流，不要让安全声音过于复杂。
One grunt might be an accident, but in an emergency you need to communicate quickly, so don't make your safe sound anything complicated.
这提出使用任何技术时的重要观点：确保不要使用过于复杂的包来处理也许是相当简单的需求。
This brings up an important point in using any technology: Make sure you don't use an overly complex package to address what may be your rather simple needs.
不要把推和拉的动作想的过于复杂。
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