Before the beginning of the ____, a team of scientits and ____ were about to create a digital map of the Ganges river to ____ and ____ waste in order to ____ it. The project will ____ a map of the ____ system of major cities along the river as well ____ the main sources of ____. After identifying these sources of ____, it will be easier to ____ the places which must be cleaned first. This project is ____ expensive, it is ____ anything compared to the amount of money which has to be ____ to ____ this problem in the future.

Science to the rescue

由
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？