I heard several bomb bursts.是什么意思？

I heard several bomb bursts.

我听到了几声炸弹的爆炸声。

heard

v. 听到，听见( hear的过去式和过去分词 )，听说，得知，听取；

例句
He acted as if he hadn't heard any of it...
他表现得好像对此毫不知情。

several

adj. 几个的，专有的，各自的，分别的；pron. 几个，数个，一些；

例句
He's already altered several of the proposals in his economic plan to accommodate demands of special interests.
他已经改动了经济计划中的几项提议以迁就特殊利益集团的要求。

bomb

n. 炸弹，彻底的失败，[橄榄球] 长传，高压贮罐；vt. 轰炸，投弹于；vi. 投弹，[俚语] 惨败，[俚语] 涂鸦；

例句
She had been trying to assemble the bomb when it went off in her arms...
在她试图组装炸弹时，炸弹在她怀里爆炸了。

bursts

v. 爆炸( burst的第三人称单数 )，突然发作，突然打开，挤满；

例句
It is easier to cope with short bursts of activity than with prolonged exercise...
和长时间的锻炼相比，短期内加强活动更容易应付。