But one of the two available Chambers is empty and rescue workers fear that the four miners were unable to reach the other chamber.
不过两个可以使用的气密室中有一个是空的。营救人员担心这四名矿工无法抵达另一个气密室。
2
Rescue teams are drilling three additional boreholes more than 330 meters deep to ventilate toxic gases and reach a six-meter-wide chamber where officials believe the miners are.