They usually appear in the big Sunday editions where they need a lot of background stories to help fill off the space between the ads.

它们通常出现在大型的周日版报纸上，需要大量的背景故事来填补广告之间的空白。

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The stars involved can usually be identified even in the bright night skies of a big city, although here they appear over darker Stagecoach, Colorado, USA..

这些恒星就算是在大城市最明亮的夜里也通常能够看得见，而这里它们出现在美国科罗拉多州Stagecoach的黑暗天空中。

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They appear to have a smooth, shiny surface and are usually skin colored or translucent.

他们似乎有一个顺利的，有光泽的表面，而且通常皮肤色或半透明。

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They say babies should be examined when their first teeth appear -- usually at around six months.

VOA: special.2009.03.11

You can find these messages and try to read them, but they usually appear to be gibberish.

BBC: Beware the cookie monster: a new law aims to protect privacy

They are not usually the bargains they appear to be.

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But officials are being asked to consider ballot papers bearing 'smiley' faces and games of noughts and crosses, as long as they appear in the space usually reserved for the voters 'X'.

BBC: 'X' marks the spot