释义 |
sea lettucenoun [mass noun]An edible seaweed with green fronds that resemble lettuce leaves.- Ulva lactuca, division Chlorophyta.
For other species you should look closely at the kelp and purple sea lettuces, where you will often find various exotic-looking examples in the process of mating....- Species of sea lettuce form light yellowish green to dark green sheets and are common to our area and most shorelines around the world.
- Removing the sea lettuce</EM> will reduce the amount of nutrients in the ecosystem, which would be returned to the water if algae were allowed to decompose in place.
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