With characteristic impetuosity, he announced he was leaving school.是什么意思？

With characteristic impetuosity, he announced he was leaving school.

一贯性急冲动的他又宣布要退学了。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

characteristic

adj. 特有的，独特的，表示特性的，显示…的特征的；n. 特性，特征，特色，[数]（对数的）首数，独特性，性质；

例句
...the absence of strife between the generations that was so characteristic of such societies...
这些社会中典型的代际冲突的缺失

impetuosity

n. 激烈，冲动，性急；

例句
Blind faith and impetuosity have led them into their present difficulties.
盲从和狂热使他们陷入目前的困境.

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

announced

v. 宣布（ announce的过去式和过去分词 ），通知，广播，声称；

例句
The subject of the talk is announced a week in advance.
会谈的主题已提前一周宣布。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

leaving

n. 离开；v. 离开( leave的现在分词 )，遗弃，忘了带，交托；

例句
The sun has already set, leaving the sky afire with orange and green light.
太阳已经落山，但天空中还映照着如火般橙绿相间的余晖。

school

n. 学校，上学，学院，群；vt. 训练，锻炼，教育，教导，约束，给…上学；

例句
I was terrible at school and left with few academic qualifications...
我的学习成绩一塌糊涂，离校时几乎没有学历。