英语语法分析

During a recent session at the Erlanger Cancer Center in Chattanooga, Tennessee, about a dozen children ages six to 12 toured the chemotherapy infusion and radiation rooms.

在最近一次参观田纳西州查塔努加市厄兰格癌症中心的活动中，约有十二名6 - 12岁的儿童进入了灌注放射化疗室。