周围的矿井里的确有沼气聚积。Methane gas does collect in the mines around here.尽管矿井的安全状况有了很大改善，矿工的家属仍然害怕最糟的情况会发生。Though mine safety has much improved, miners' families still fear the worst.矿井中用钢制通风机来保持空气流通。The pit is ventilated by...
双方的武装力量都有密集动作。The military on both sides are involved in intense activity.在建筑密集区域，车速限制为每小时30英里。A speed limit of 30 mph was introduced in built-up areas.他四周的人群密集起来。The crowds around him began to thicken....