billion-dollar grass

名词 n.
中文释义

英文释义

名词 n.
  1. Any of the genus Echinochloa of barnyard grass, widely considered harmful weeds. countable,uncountable

词形变化

billion-dollar grasses plural

词源

Probably so-called because of the adverse impact of Echinochloa weeds on yields rice and other crops.
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