Upfront costs make them too expensive for most general lighting applications, but experts expect that to change over the next five years as prices come down and efficiencies go up.

前期成本过高使得他们无法用于最普通的照明电器上，但是专家估计再有五年价格降低功效增加，这个会改善的。

youdao

Upfront costs make them too expensive for most general lighting applications, but experts expect that to change over the next five years as prices come down and efficiencies go up.

前期成本过高使得他们无法用于最普通的照明电器上，但是专家估计再有五年价格降低功效增加，这个会改善的。

youdao