Appearance of city is human of moving towards ripeness and civilized sign it also is the high form of human colony formation.

城市的出现是人类走向成熟和文明的标志，也是人类群居生活的高极形式。

Semisolid agar culture to observe the effects of different concentration of drug-containing serum and Rubus parvifolius saponins on K562 cell colony formation;

半固体琼脂培养观察不同浓度的含药血清和茅莓总皂苷对K562细胞株集落生长的影响；

The results show that the capacity of colony formation of T lymphocytes in cancer patients decreases and it may be due to the immunosuppression activity of sera.

结果表明：癌症病人的T细胞集落形成能力明显降低，部分原因由病人血清中存在免疫抑制物质所致。