1ADJ [ADJ n]尘世的;世间的;人世的Earthly means happening in the material world of our life on earth and not in any spiritual life or life after death. 尘世的;世间的;人世的
...the need to confront evil during the earthly life.
2ADJ [ADJ n](用于no earthly reason等短语中表示强调)根本,绝对Earthly is used for emphasis in phrases such as no earthly reason. If you say that there is no earthly reason why something should happen, you are emphasizing that there is no reason at all why it should happen. (用于no earthly reason等短语中表示强调)根本,绝对 [emphasis]
There is no earthly reason why they should ever change.