lánjūnmén / shì / dìqiú / shàng / zuìzǎo / jìnxíng / guānghézuòyòng / de / shēngwù / zhīyī蓝菌门是地球上最早进行光合作用的生物之一。Cyanobacteria are among the earliest organisms on Earth to perform photosynthesis.