polytunnels is polytunnel's Plural Form

polytunnel

US [ˈpɑliˌtʌn(ə)l]

UK [ˈpɒliˌtʌn(ə)l]

n.塑料大棚；塑料暖房
Web棚子为塑胶温室

Plural Form：polytunnels

E-E

Web Definition

n.	1. a large plastic structure shaped like the top half of a tube that is used for growing plants that need protection from the weather