我解开手绢，开始把它们从手绢角里向外倒，火焰卷上了烟囱。

I unknotted the handkerchief, and commenced dropping them in from an angle, and the flame curled up the chimney.

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第二季的时候，Supernatural这些字从火焰中出现，而且其中的“a”还变成了五角星形。

In Season Two, it appears in flames and the "a" becomes a pentagram.

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四角切向燃烧和墙式对冲燃烧方式都有此问题，而W火焰双拱燃烧锅炉则更严重，值得关注。

This problem had occurred under corner tangential firing and wall opposed firing, and it became even more serious under W-shaped flame double-arch firing.

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