He was ruined by speculation.是什么意思？

He was ruined by speculation.

他因做投机生意而破产。

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。

ruined

adj. 毁灭的，堕落的，破产的；v. 破坏( ruin的过去式)，毁掉，使破产，使沦落；

例句
One of the most important buildings in this ruined city is a public bath...
在这座被毁坏的城市里，最重要的建筑物之一就是公共澡堂。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

speculation

n. 投机买卖，思考，投机活动，推断；

例句
In answer to speculation that she wouldn't finish the race, she boldly declared her intention of winning it.
为了回应她会中途退赛的猜测，她大胆地宣布她要赢得这场比赛。