单词	roof caving
释义	roof caving 初次落顶
随便看	private investment in public equity private-key private key cryptography private-key cryptography private key cryptosystem Private Key Cryptosystem Private-key cryptosystem private key encryption private key factor Private key file for authentication private key generator private key issuing private key trust privatekindergarten private kindergarten private kindergarten in rural area private kindergartens private label private-label private-label brands private label card private label cards private labels private laboratory private labor of science-technology