They spent months of toil on the water conservancy project.
他们为这项水利工程辛辛苦苦地干了几个月。
They spent months of toil on the water conservancy project.
他们为这个水利工程辛辛苦苦地干了几个月。
And for the quality of the water conservancy project supervision because of its features of the project and has the certain difficulty.
而对水利工程质量的监管因其工程特点而具有一定的难度。
应用推荐