Clouds often obscure the oil slick in the humid Gulf (top, April 30), and sometimes the slick is near the edge of the satellites' field of view (bottom, May 8).

云层往往会掩盖潮湿的海湾上的浮油(上图，摄于4月30日)，而有时浮油则靠近卫星的视场边缘(下图，摄于5月8日)。

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In April, sometimes it is fine, sometimes it rains in Nanjing.

南京四月，有时候好天，有时候下雨。

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April Fools' day, sometimes called all Fools' day, is one of the most light-hearted days of the year in the United States and Europe.

愚人节，也称作万愚节，在许多欧美国家，这一天是一年中最轻松的日子。

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Several of his April fools may not have taken place in April at all, so he sometimes stretches the historical evidence to make it appear that they did.

ECONOMIST: Historical mendacity

The weather, like most of the East Coast, fluctuates wildly in the fall and spring, so cycling is sometimes possible well into November and as early as April.

BBC: Visiting the Hamptons off season