They're also only a single layer in what should ideally be a many-sided approach to securing your home, one that includes common sense things like sound locks and proper exterior lighting at night.
2016年12月四级真题（第一套）阅读 Section B
英英词典释义
Adjective
1. having many parts or sides
2. having many aspects;
"a many-sided subject""a multifaceted undertaking""multifarious interests""the multifarious noise of a great city"