So how exactly does our voice box work, and what causes these shifts in speech?

那么我们的语音盒究竟是如何工作的，是什么导致了这些语音变化？

They ate breakfast together and on weekdays drove off to the navy shipping center every morning where they both worked - Jimmy unloaded color-coded boxes.

他们一道吃早饭，平时每天早上一道开车去海军航运中心，他们都在那里工作，吉米在那搬卸标有彩色代号的箱子。