There is no guarantee of the quality and authenticity of products.

商品质量和真实性无法保障。

youdao

Building structure is related to the strength of construction, which is the guarantee of the quality of construction.

建筑结构关系到建筑的坚固程度，是建筑质量的保障。

youdao

There is no guarantee of the quality and authenticity of products. Neither Taobao nor consumers are certain of sellers' locations.

他说，“产品的质量和真实性没有任何保证，淘宝和消费者都无法了解买家的真实地址，监察机构也不知道。

youdao

At the moment, African medicinal plants are often ignored because foreign buyers have no guarantee of the quality of the materials they are purchasing.

ECONOMIST: A pharmacopoeia for Africa

This is a shame because you can't then guarantee the quality of the product and, on top of that, you lose the emotional connection to the food ... it becomes more like a commodity.

CNN: Indian master chef gets fresh at 'world's best restaurant'

The day after the reform package was announced, the head of Ofqual wrote to Mr Gove warning that introducing too much change at one time might mean the regulator could not guarantee the quality of the exams.

BBC: Q&A: Changes to the teaching of key subjects