beetleback mass虫: insect; worm壳: shell; hard surface大: big; large群: crowd; group大群: army; cloud; jumpbogroup; multitude; supergroup; swarm of; troop下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:虫壳大群，即可在微信中查询翻译
