He officially announced his retirement from first-class cricket yesterday.是什么意思？

He officially announced his retirement from first-class cricket yesterday.

他昨天正式宣布退出甲级板球赛。

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。

officially

adv. 官方地，正式地，公务上；

例句
During the Soviet era and its immediate aftermath, the region was officially known as 'Middle Asia and Kazakhstan'.
在苏联时代和紧随其后的一段时期，该地区的官方名称为“中亚和哈萨克斯坦”。

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。

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。

retirement

n. 退休，退职，引退，隐居，退隐处；

例句
There will be more work to do, not less. Bang goes the fantasy of retirement at 35.
工作只会增加，不会减少。梦想着35岁退休是彻底没戏了。

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

cricket

n. 蟋蟀，板球，矮木凳；vi. 打板球；adj. 公平的；

例句
There was precious little about the cricket to animate the crowd...
板球比赛能激起观众热情的地方很少。

yesterday

n. 昨天，往昔，<正式>过去；adv. 在昨天，在昨日，近来；

例句
A police investigation yesterday absolved the police of all blame in the incident.
警方昨天的调查廓清了其在此事件中的任何责任。