Can or may: Ability and permission
先写下记得的内容，再查看解释。不要填写个人信息。
查看解释
Can indicates that a person has the skill, strength, or opportunity to do an action. In everyday speech, it also asks for and grants permission. May indicates that an event has a chance of occurring in the future or that an action is permitted according to formal rules and polite requests.
Elena can operate the lab equipment without supervision.