Slightly Unacceptable product: it refers to the unit product that has one more general or slight defects, but without fatal or severe defects.

轻不合格品：有一个或一个以上一般缺陷或轻微缺陷，但不包含致命和严重缺陷的单位产品。

youdao

At the casing factory, the foreman showed us an example of a product he had made that he deemed to be of unacceptable quality.

在一家套管厂，工头向我展示了一个产品的例子，他自己也认为这个产品的质量的确不合格。

youdao

Lester: I'm afraid that's unacceptable. Your contract says that you will deliver a product with a reject rate of less than five percent.

莱司特：恐怕我们无法接受。你们的合约上说你们会以低于百分之五的瑕疵率交货。

youdao

But the final product could then be unacceptable to liberal Democrats.

ECONOMIST: The Senate bill is finally published

The public battle started when a number of big British supermarket groups stated flatly that any systematic fault was as unacceptable in wine as it was in any other product.

ECONOMIST: Plastic wine stoppers