她回忆说：“以前我们不(容易)确定手头有多少存货。”
Before, we were not able to [easily] determine how much inventory we had on hand.
许多自动扶梯没人使用，列车也不如以前频繁了，以前全天候便利商店的繁杂的货架上现在基本没有存货。
Many public escalators are idle, the trains less frequent and the usually overflowing shelves of the round-the-clock convenience stores sparsely stocked.
以前您制作过存货单吗？
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