youdao

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.

youdao

接下来，两边开始出现模糊的房子、墙、树等等的轮廓，但一切都是静止的。

Next, there begins to appear on either side vague Outlines of houses, walls, trees, etc., but everything is motionless.

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