Fog on the other hand, is local.It relies on low-powered convection currents to ramble wherever it is easiest to drift to, and is then trapped by gentle, patient cul-de-sacs in the hills.

• 它依赖于弱势力的空气对流，而对流的雾气总是会漫游到最容易漂浮的地方，然后滞留在温和耐心的小山丘环绕形成的死胡同里。