Learning how to safely harness the invisible, odorless resource took some time. Many a building was blown to matchwood because of leaking gas. In 1908, a mattress factory exploded.
学习如何安全使用这种无形、无味的资源需要时间。很多建筑因为漏气而被炸成碎片。1908年，一家床垫厂发生爆炸。
Learning how to safely harness the invisible, odorless resource took some time. Many a building was blown to matchwood because of leaking gas. In 1908, a mattress factory exploded.
学习如何安全使用这种无形、无味的资源需要时间。很多建筑因为漏气而被炸成碎片。1908年，一家床垫厂发生爆炸。
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