| 单词 | 浓度梯度 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔concentration gradient〕The graduated difference in concentration of a solute per unit distance through a solution.浓度梯度：贯穿整个溶液的每单位距离间的浓度差别美国传统〔morphogen〕Any of various chemicals in embryonic tissue that influence the movement and organization of cells during morphogenesis by forming a concentration gradient.构形素，定形素：在形态发生过程中通过形成浓度梯度从而对细胞的运动和组织产生影响的胚胎组织中多种化学品的任何一种美国传统 |
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