Tundra is one of the large flat areas of land in the north of Europe, Asia, and America. The ground below the top layer of soil is always frozen and no trees grow there.
英漢詞典釋義
n.
(多數位于北極圈的)凍土帶;苔原, 凍原, 寒漠
mountain tundra山地凍原The arctic tundra is at the top of the world around the North Pole.北極凍原是指北極點周邊的地區，是世界最高的地方。
英英詞典釋義
Noun
1. a vast treeless plain in the arctic regions between the ice cap and the tree line