新西兰英语 368 Miners still trapped

　　There is still no news about the 29 miners² trapped in the Pike River coal mine. The company is still testing the air quality every half hour but it is still not safe to send in a rescue team.
They are also drilling a hole – 150mm diameter³ – into the tunnel where they think the miners are. They have drilled down 135m but have hit hard rock so it is now slow work. They plan to send a camera down. There is also a plan to send in a robot from the entrance along the tunnel but there is a danger of a spark⁴ starting an explosion⁵. A coal mine is dangerous because of the risk of fire and an explosion.
Although there is no food in the tunnel, the miners could be near water pipes and air pipes. Each miner¹ wears an oxygen pack which gives them oxygen for about half an hour. These packs helped two miners to escape on Friday afternoon after the explosion. All the miners have a light on their helmet but the batteries last only about 24 hours.
Police gave the names of all 29 miners today. It was very sad to see the names, ages and photos of all these miners.
Questions
What are the differences between this mining accident and the one in Chile where 33 miners were trapped?
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1 miner   

n.矿工

参考例句：

• He was a miner all his working life.他一辈子都是矿工。
• I think it is dangerous to be a miner.我认为当矿工是很危险的。

2 miners   

矿工( miner的名词复数 )

参考例句：

• The coal miners have come out for about two weeks. 煤矿工人已罢工约两周了。
• The roof of the cave dropped in on the miners, trapping them. 洞穴的顶部坍了下来，砸在矿工身上。

3 diameter   

n.直径

参考例句：

• The circle has a diameter of 6 inches.这个圆直径六英寸。
• A diameter passes through the center of a circle.直径从圆心穿过。

4 spark   

n.火花，朝气，情人，俗丽的年轻人；vi.闪烁，冒火花，热情回应；vt.激发，引起，追求

参考例句：

• A single spark can start a prairie fire.星星之火，可以燎原。
• What made the electric wire spark?电线冒火花是什么原因？

5 explosion   

n.爆发，发出，爆炸

参考例句：

• The police arrived right at the moment of the explosion.警察就在爆炸的那个时候赶到了。
• The shock of the explosion was felt far away.爆炸引起的震动很远都可感觉到。