He was aged between 25 and 30, with a medium build and collar-length mousy hair.是什么意思？

He was aged between 25 and 30, with a medium build and collar-length mousy hair.

他年龄在25至30岁之间，中等个，灰褐色的头发长至衣领。

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。

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。

aged

adj. 老年的，陈年的，（食品、酒等）陈年的，（动物）达到几岁龄的，老年人特有的；v. “age”的过去式和过去分词，使显老，使苍老；

例句
He had always looked so young, but he seemed to have aged in the last few months...
他原来一直看起来很年轻，但最近几个月他显得老了。

between

prep. 在…之间，私下，暗中，在…中任择其一，来往于…之间；adv. 当中，中间；

例句
How big is the abyss between what you think you are and what you actually are?
你对自己的认识和真实的你之间差别到底有多大？

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

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。

medium

adj. 中等的，中级的，普通的，平均的，五分熟的；n. 媒介物，媒质，中间，中庸，[生]培养基，培养液，颜料溶解液，[数]中数，平均，[逻]中名辞，手段，方法，中间物，中号；

例句
He's described as around thirty years old, six feet tall and of medium build...
他被描述成一个30岁左右、6英尺高、中等身材的人。

build

vt. 建造，构筑，建立，开发，为…建立基础；vi. 建造，营造，扩大，扩展，发展，达到；n. 体格，构造，〈俚〉优美的体型，肉体美；

例句
Marine construction technology like this is very complex, somewhat analogous to trying to build a bridge under water.
像这样的海底建造技术很复杂，与尝试在水下建桥有些相似。

mousy

adj. 像老鼠的，多老鼠的，鼠臭的；

例句
He was average height, average build, with mousy hair and a forgettable face.
他中等身高、中等身材、灰褐色头发，长着一张过目即忘的脸。

hair

n. 头发，毛发，（动、植物的）毛，一丝丝，些微，毛发织物；

例句
The wind pushed his hair across his face.
他的发丝随风拂面。