holystr能组成history；
history
n. 历史，历史学；历史记录；来历
例句
History is an interpretive process.
历史是一个解释过程。
I hate homework. Specially history.
我讨厌家庭作业，特别是历史。
He\'s doing an A2 (level) in History.
他正在学习A2证书考试的历史科目。
I have a history class at 9 o\'clock.
我9点钟有历史课。
I loved history when I was at school.
我上学时喜欢历史。
