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| alga Simple, green, aquatic plants without stems, roots or leaves. They are among the microscopic organisms that form the start of the food chain. Algae are found floating in the sea and fresh water, but they also grow on the surface of damp walls, rocks, the bark of trees and on soil. They contain chlorophyll and other pigments that let them grow by photosynthesis. On land, algae can be useful in improving the fertility of soil by nitrogen fixation; alga | |||
| algae (Algae) | |||
| wrack | |||
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| alga; seaweed | |||
| sea trumpet (Eisenia bicyclis) | |||
| algae | |||
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| algal species | |||
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| weeds condiment | |||
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algas : 148 短语, 23 学科 |
| 一般 | 6 |
| 养鱼（养鱼） | 12 |
| 农业 | 25 |
| 医疗的 | 2 |
| 地质学 | 3 |
| 微生物学 | 2 |
| 技术 | 2 |
| 植物学 | 12 |
| 植物生长 | 2 |
| 海洋学（海洋学） | 1 |
| 渔业（渔业） | 8 |
| 环境 | 18 |
| 生命科学 | 9 |
| 生物化学 | 6 |
| 生物学 | 2 |
| 组织机构名称 | 1 |
| 联合国 | 3 |
| 自然科学 | 12 |
| 自然资源和野生动物保护 | 9 |
| 运输 | 1 |
| 食品工业 | 3 |
| 食品服务和餐饮 | 1 |
| 鱼类学 | 8 |