Where’s the safest place to cross the street?
Something that is safe does not cause physical harm or danger. 安全的
If you cross something such as a room, a road, or an area of land or water, you move or travel to the other side of it. If you cross to a place, you move or travel over a room, road, or area of land or water in order to reach that place. 穿过; 穿过去
Facts about the crosswalk
A pedestrian crossing (British English) or crosswalk (American English) is a place designated for pedestrians to cross a road. Pelican crosswalks are designed to keep pedestrians together where they can be seen by motorists, and where they can cross most safely across the flow of vehicular traffic.