单词	凭单封套
释义	凭单封套voucher jacket
随便看	learning plateau learning portfolio learning principle learning process learning process for reliability learning program learning prototype learning psychology learning rate learning readiness learning reinforcement learning resource center learning resources learning resources center learning resources center{=lrc} learning resources centre learning resources exchange program learning resources exchange program--lrep learning resources exchange program，lrep learning resources specialist learnings learning sequence learning set learning simple conception learning society