| 单词 | purple bacteria |
| 释义 | purple bacteria (once / 5909656 pages) n WORD FAMILY purple bacteria USAGE EXAMPLESThe purple bacteria have thus two sources of energy, one by the oxidation of sulphur and another by the absorption of "dark rays." Various, Encyclopaedia Britannica, 11th Edit...(2010) n free-living Gram-negative pink to purplish-brown bacteria containing bacteriochlorophyll Hyper phototrophic bacteria, phototropic bacteria green and purple bacteria; energy for growth is derived from sunlight; carbon is derived from carbon dioxide or organic carbon |
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