Perhaps because of it's low effectiveness.

或许是因为它的低效率。

youdao

Traditional means of land use survey at county level costs a great quantity of manpower and material resource, but with low effectiveness.

传统县级土地利用调查手段需要耗费大量的人力物力，效率低下。

youdao

In practice, because the relevant norms can not synchronize often leads to motivation is not high and the low effectiveness of such issues.

在实践中，因为相关规范不能同步往往导致工作积极性不高和成效低下等问题。

youdao

The technology is transparent, likely with low running costs and wide-area effectiveness, once baseline infrastructure is in place across devices, communications, and trained people.

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This gave an effectiveness of 17%, which is so low as to be statistically non-significant.

BBC: Tuberculosis vaccine hopes dashed

Although camps are a low-cost option, the poor outcomes reduced cost-effectiveness.

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