This scheme can improve sensitivity ofprotection, and make it possible to asynchronous communication for optical fiber differential protection, and reduce costofprotection set.
此方案可提高保护的灵敏度，同时为光纤纵差保护采用异步通信方式提供可能，达到降低保护装置成本的目的。
2
The town is now counting the costof its failure to provide adequate flood protection.
这个镇未采取充分的防洪措施，现在尝到苦头了。
《牛津词典》
3
While this protection strategy allows higher network throughput, it does so at the costof some network security.