perennially frozen ground; pergelisol; permafrost; permanently frozen ground | ชั้นดินเยือกแข็งคงตัว [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
perennially |
perennially |
perennially | (adv) in a perennial manner; repeatedly |
Perennially | adv. In a perennial manner. [ 1913 Webster ] |