英语翻译【都用 concern 翻译.】让我们担心的是我们对事态的变化缺乏准备.孩子们没有在通常的放学时间回家,母亲很为

it makes us concerned because we had made little preparation for the change of the affair.
the children didnot come back home on time so their mon feel much concerned about their safety.
all the people concerned are very regretful for it