More than 100 million people across Canada and the United States are under air quality alerts as smoke from wildfires in Quebec drifts westward.

魁北克野火产生的烟雾向西漂移，加拿大和美国部分地区处于空气质量警报状态，超过一亿人处于恶劣空气质量之中。

Day after day they journeyed up-stream, until, rounding a sudden bend, they beheld a bark lodge with a thin blue curl of smoke drifting from its roof.

日复一日，他们逆流而上，直到拐过一个急转弯，他们看到一间树皮小屋，房顶上飘出一缕缕蓝色的薄烟。