Those dark clouds spell rain.

乌云预示着雨的来临。

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The latest spell of rain will definitely hamper our efforts.

BBC: NEWS | South Asia | Rains return to devastated Mumbai

Hamilton set a lap of one minute 25.801 seconds to edge out team-mate Jenson Button by 0.275 secs before a spell of heavy rain hit the Albert Park track.

BBC: Lewis Hamilton fastest in Friday Australian GP practice

The recent hot spell had left the course fast-running and bone-hard before the rain took the edge off for the first round.

BBC: SPORT | Golf | Last-hole eagle sees Tiger shine