“Necessary conditions extraterrestrial life”的意思、由来-开放百科全书

词条	Necessary conditions extraterrestrial life
释义	SeeDrake equation
随便看	Check on Me Check On Me Check On Me Tonight Check on Me Tonight Checkoslovakia Checkout aisle Checkout chick Check out Drew's Old Flame Checkout lane Checkov dollars Check (pattern) Checkpiont (cell cycle) Check, Please Check, Please! Check Please Check point Checkpoint 303 Checkpoint Alpha Checkpoint (biology) Check point charlie Checkpoint Charlie Museum CheckPoint INSPECT Code Check Point Integrity Check Point IPSO Checkpoint (novel)

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。