I feel as if I've been down a coal hole and someone's opened the lid and brought me into the sunlight.
我感觉好像我一直在矿井底下,突然有人打开了井盖,让我见到了阳光。
英语百科
Coal hole
A coal hole is a hatch in the pavement (sidewalk, in US usage) above an underground coal bunker. They are sometimes found outside houses that existed during the period when coal was widely used for domestic heating from the early 19th century to the middle 20th century. In Britain they became largely obsolete within the major cities of the UK when the Clean Air Act forced a move towards oil and gas for home heating.