覆盖 (fù gài): для покрытия

Winter has arrived, and heavy snow has covered the entire village, turning the roofs and tree branches white. (This shows physical coverage by snow.)

This company's business covers more than thirty cities nationwide, and has even expanded to overseas markets. (Here 'cover' means to include a range of areas.)

The cell phone signal is too weak; this area has no network coverage. We have to walk to the top of the hill to make a call. (Here 'coverage' refers to telecommunications service.)

His report covered all aspects of the project, from market research to final implementation—it was very comprehensive. (Here 'cover' means to include or deal with a range of topics.)