When the human enters into the ravine, and sees gurgling the rivulet murmur, the adverse current on, and not far away cloud steams the fog to circle, suddenly thick suddenly pale.

人入山沟，但见淙淙细流潺潺而出，逆流而上，不远处云蒸雾绕，忽浓忽淡。

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According to statistics, 50 % of all collision accidents are taken place in fog. Therefore, how to improve the navigation safety in fog has attracted the common concerning of navigation circle.

据统计船舶碰撞事故中50%以上是在雾航情况下发生的，因此，如何提高雾航安全是航海界普遍关心的问题。

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As the match wore on, the fog congregating around the centre circle gave off the appearance of mid-December rather than mid-March.

BBC: Sport - Football - Dundee United 2-0 Hearts

The primitive "Avebury Stone Circle, Wiltshire" (1945) emerges from a fog, the grazing sheep as archaic as the megaliths.

WSJ: What Went On in the Dark | Bill Brandt | Shadows and Light | Museum of Modern Art | By William Meyers