英语语法分析

The researchers determined the threshold for 0.1% fluocinonide cream in 126 children between 3 months and 17 years old.

研究者通过在126名3个月到17岁的儿童身上进行试验，确定了氟轻松软膏的给药上限是0.1%。

They were separated into four age groups and randomized to once-daily or twice-daily treatment with fluocinonide cream for 2 weeks.

他们被分为四个年龄组，随机分组后两周内每组一天一次或每天两次给药。