understorey
noun [ C or U ] biology, environment UK specialized (US understory) uk/ˈʌn.dəˌstɔː.ri/ us/ˈʌn.dɚˌstɔːr.i/
下层林木
a layer of plants and bushes that grows under the canopy (= the thick, high roof formed by branches and leaves) of a forest
There are many old plants, as well as a thriving understorey of seedlings. 这里有许多古老的植物，也有茁壮生长的下层林木。
The article examines the effects of surface fires on understorey in central Brazilian Amazonia. 本文探讨的是巴西中部亚马逊地区地表火灾对下层林木的影响。