环带，生殖带某些环节动物蠕虫表皮的膨胀、含腺的鞍状带，例如蚯蚓，分泌一种粘性液体而在其卵上形成一层防护层。
A swollen glandular saddlelike region in the epidermis of certain annelid worms such as the earthworm that secretes a viscous fluid to form a cocoon for their eggs.
虽则低饲粮叨质求给下渗出进程率，但是总卵黑露质露址⒔正在渗进的整丁卵黑量含质相痴轨减少。
Though low feed concentration provide high permeation rate but total protein concentration and individual protein concentration in the permeate decreases considerably.
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