There lay his sandwich, with its two slices of cheap black bread.

三明治是两片劣质的面包。

youdao

Its function is to buy in enough electricity with as cheap as possible cost.

其功能是以尽可能低的成本购入足够的电量，以满足系统中负荷的需求。

youdao

Its function is to buy in enough electricity with as cheap as possible cost.

其功能是以尽可能低的成本购入足够的电量，以满足系统中负荷的需求。

youdao