tumbleweed
noun [ U ] uk/ˈtʌm.bəl.wiːd/ us/ˈtʌm.bəl.wiːd/
风滚草(生长于北美和澳大利亚,枯萎后在地面处折落,随风像球一样四处滚动)
a plant of North America and Australia that breaks near the ground when it dies, and forms large balls that are rolled around by the wind
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