| 单词 | great duckweed |
| 释义 | great duckweed (extremely rare) n WORD FAMILY great duckweed n cosmopolitan except South America and New Zealand and some oceanic islands Syn|Hyper Spirodela polyrrhiza, water flaxseed duckweed any small or minute aquatic plant of the family Lemnaceae that float on or near the surface of shallow ponds |
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