I was sorry he had left, although I soon developed a productive relationship with his successors.是什么意思？

I was sorry he had left, although I soon developed a productive relationship with his successors.

虽然我很快就和他的继任者建立了良好的关系，但是我仍然对他的离开感到遗憾。

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。

sorry

adj. 对不起的，无价值的，低等的，遗憾的，感到伤心的；

例句
'I'm sorry about Patrick,' she said...
“我为帕特里克感到难过，”她说。

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。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

left

adj. 左边的，左侧的，左派的；n. 左，左面，[军]左翼，左派，激进分子；adv. 向左，在左边；v. 离开( leave的过去式和过去分词)；

例句
All that digging had left a network of abandoned mines and tunnels.
东挖西掘后留下了一片废弃的矿坑。

although

conj. 尽管，虽然，但是，然

例句
He was in love with her, although he did not put that name to it.
他爱着她，虽然他没有将其称为爱。

soon

adv. 立刻，马上，一会儿，不久，快，宁愿；

例句
The minister advised him to leave as soon as possible...
部长建议他尽快离开。

developed

adj. 先进的，发达的（国家或地区）；

例句
He had developed a slight American accent.
他说话带上了一点轻微的美国口音。

productive

adj. 富有成效的，多产的，生产性的，具有创造性的；

例句
On average, American firms remain the most productive in the world.
总体来讲，美国公司在全球范围内还是产值最高。

relationship

n. 关系，联系，浪漫关系，血缘关系；

例句
Our relationship made me feel more alive...
我们的关系使我感到更有活力。

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。

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

successors

n. 接替的人或事物，继任者，继承人( successor的名词复数 )；