I'm engrossed in the task, checking catalogue numbers against the items we need and the items we've ordered, eyes flicking from the order book to the computer screen and back as I make sure the entries match.

我专注于工作，对照我们需要的物品和我们已经下单的物品核对类别代码，眼睛在订单簿和电脑屏幕间来回扫视确保输入的信息是对应的。