英语语法分析

One day after plating, the cells were exposed for 2 h to various doses of ethylnitrosourea (ENU). CAs and SCEs were examined by the standard methods, while CT was determined by cell counts.

接种细胞一天后，用不同剂量乙基亚硝基脲（ENU）处理2小时，然后用标准法检查其染色体畸变和SCE率，用细胞计数法测定细胞毒性。