sinkhole, 天坑

One resident said a smaller version of the hole was first spotted when a postman fell down it as he was working in the area, reportedly injuring his leg
St Albans sinkhole opens up in suburban cul-de-sac | Daily Mail Online
Read more: http://www.dailymail.co.uk/news/article-3256035/Residents-evacuated-massive-sinkhole-opens-suburban-cul-sac.html#ixzz3nKTMNfnI
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