Scarcely had the gas and the air entered the hearth when they began to form a very hot flame.

燃气和空气一进入炉膛，就开始形成灼热的火焰。

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The anthracite is the most valuable type of coal. It burns slowly, with little smoke and a very hot flame.

无烟煤是一种最有价值的煤，它燃烧慢，烟很少但火焰却很大。

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Blowtorch:a portable burner for mixing gas and oxygen to produce a very hot flame, used for soldering, welding, and glass blowing.

喷灯：使混合气体和氧气产生更炽热火焰的便携助燃剂，常用于接合、焊接和玻璃吹制。属类：【综合句库】-〖未分类〗-[-]。

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Blowtorch:a portable burner for mixing gas and oxygen to produce a very hot flame, used for soldering, welding, and glass blowing.

喷灯：使混合气体和氧气产生更炽热火焰的便携助燃剂，常用于接合、焊接和玻璃吹制。属类：【综合句库】-〖未分类〗-[-]。

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