| 单词 | 界线分明 |
| 释义 | 〔monocyte〕A large, circulating, phagocytic white blood cell, having a single well-defined nucleus and very fine granulation in the cytoplasm. Monocytes constitute from 3 to 8 percent of the white blood cells in human beings.单核细胞：一种循环巨噬白血细胞，生有一个界线分明的核，在细胞浆中有微小颗粒。单核细胞占人体白血细胞的3%到8%〔cumulus〕A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses.积云：一种浓密、平底状的白色云块，有一个多重圆形的顶部和界线分明的轮廓，通常是由不稳定的热气团上升形成的 |
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