I had to strain to hear...是什么意思？

I had to strain to hear...

我不得不使劲去听。

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。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

strain

n. 压力，拉力，张力，拉伤，扭伤，个性特点；vt. 拉伤，损伤，尽力，竭力，使不堪承受，过滤；vi. 拉紧，用力拉，尽力，竭力；

例句
Red eyes denote strain and fatigue...
眼睛充血表明压力过大、身心疲惫。

hear

vt.& vi. 听到，听见；vt. 听说，得知，听取，审理；vi. 听，听见；

例句
When I listen to her play I can hear a new Nigel Kennedy.
从她的演奏中我听出了新一代的奈杰尔·肯尼迪。