tundra

n.冻土带

tumble, tumble-drier (also `tumbler-drier), tumbledown, tumbler, tumbler-drier, tumbleweed, tumbrel (also tumbril), tumescence, tumescent, tumid, tumidity, tummy, tumor, tumorous, tumour (US tumor), tumult, tumultuous, tumulus, tun, tuna, tune, tune in, tune in (to), tune out, tune up, tune-up, tuneful, tunefully, tunefulness, tuneless, tunelessly, tunelessness, tuner, tungsten, tunic, tuning-fork, tunnel, tunnel vision, tunny, tup,