【四川发现世界现存最大水栖昆虫标本 翅展竟比成人手掌还长？】The world’s largest aquatic insect has been discovered in Chengdu, Sichuan. The biggest among those found, which belongs to the order of the Megaloptera , has a wingspan of 21 cm, as long as the hand of an adult human.展开全文
