英语翻译句子！！！！！！

1：特别坚硬的玻璃突然发生破裂

2：没有发现任何呗撞击的痕迹

3：调查派出了人为因素

4：几个月以后，调查者从一位有经验的玻璃厂工人处得到真正的原因：这种玻璃内的一种特殊物质导致其破裂

1: especially hard glass suddenly burst

2: found no trace of bai impact

3: survey sent the man-made factors

4: a few months later, the investigators from an experienced worker in the glass for true reason: the glass of a kind of special material within its rupture

1. an extra hard glass breaks suddenly

2. no sign / no trace of any collision was discovered, did not find any sing of being knocked on.

3. the investigation excluded any human factor

4. After a few months, the investigators found out from an experienced worker of the glass factory : there is a special substance in the glass that leads to its rupture

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