A firewall provides an essential securityblanket for your computer network.
防火墙为计算机网络提供了基本安全保障。
《牛津词典》
2
The government has thrown a securityblanket around the talks.
政府明令禁止泄露谈判内容。
《牛津词典》
3
Of those Australians who still have a landline, a third concede that it's not really necessary and they're keeping it as a securityblanket—19 percent say they never use it while a further 13 percent keep it in case of emergencies.