Sales have dropped off.

销售量下降了。

youdao

Now, however, he said that his company’s sales have dropped by two-thirds over the last decade, forcing him to lay off half of his 23 employees.

然而，他还表示，最近十年中，他的公司销售额已经下降三分之二，这迫使他解雇了二十三名雇员中的半数。

youdao

Since antianxiety medicine BuSpar went off-patent in April, for instance, sales of the drug have dropped 54%.

FORBES: Drugs of Choice