Jobs had built a frequency counter when he was part of the HP Explorers Club, and they used it to calibrate the desired tones.

乔布斯之前在惠普探索者俱乐部的时候就傲过一个频率计数器，他们用这个计数器来调校他们需要的声音。

He gave a job that summer. A summer job at Hewlett-Packard, right here (on) in Santa Clara, off 280, the division that built frequency counters. And I was in heaven.

惠普的暑期实习，就在Snata Clara 280号公路旁边，我被分在计频器部门，简直像去了天堂。

And he picked up the phone and I talked to him and I asked him if he'd give me some spare parts for something I was building called a frequency counter.

我问他是否能送我些零件做频率计数器。

The kids in the Explorers Club were encouraged to do projects, and Jobs decided to build a frequency counter, which measures the number of pulses per second in an electronic signal.

探索者俱乐部的孩子们被鼓励做一些项目，乔布斯决定做一台频率计数器，这是用来测量一个电子信号中每秒钟的脉冲数量的。

He began by recalling that he had wanted to build a frequency counter when he was twelve, and he was able to look up Bill Hewlett, the founder of HP, in the phone book and call him to get parts.

他先是回忆自己12岁的时候曾经想要做一个频率计数器，当时他在电话簿上查到了惠普的创始人比尔·休利特的号码，并给他打电话，想要得到一些零部件。