Even if they could, Simpli Safe claims that its system is always evolving, and that it varies slightly from system to system, which means there wouldn't be a universal magic formula for cracking it.
2016年12月四级真题（第一套）阅读 Section B
英语六级真题
When the molten rock of the earth's core forced its way to the surface to form the throat of a volcano, as the centuries passed, the rock cooled and hardened, shrinking and cracking into long columns.
2016年12月六级真题（第二套）听力 Section B
柯林斯高阶英汉双解学习词典释义
ADJ
优秀的;极好的;顶呱呱的
You use cracking to describe something you think is very good or exciting.
"the crack of a whip""he heard the cracking of the ice""he can hear the snap of a twig"
2. the act of cracking something
3. the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)
Adjective
1. very good;
"he did a bully job""a neat sports car""had a great time at the party""you look simply smashing"