怎么区别constantly和continuing?

The scope of the epidemic continued to spread - the epidemic from Xi'an to gradually spread to the surrounding areas has now spread to all the province's urban areas, and showed the continuing spread of the proliferation of trends;Mild illness - now confirmed cases of illness in ...

造船回乡，鲁滨孙又花费了数年的时间，无数的心血。光砍树就是数月。但由于事先没有考虑周全，船离海边太远，他怎么也无法让船下水。这下，数年的心血白花了，一切希望都破灭了。直到星期五的出现，这个希望才重新油然升起！鲁滨孙是个伟大的人，坚毅的人，孤身一人在这个荒无人烟的孤岛上生活了27年...

many of these "temporary" rivers found paths to Hudson Bay or the Arctic Ocean, leaving the Mississippi Basin with many features "oversized" for the existing rivers to have carved in the same time period. The Mississippi River Delta has shifted and changed constantly since the format...