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The initial phase has been very steep, taking health experts off guard. That might be in part because of the cold weather.

流感的初期阶段很突然，这让健康专家都猝不及防，可能部分原因是由于天气寒冷造成的。

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Washing them in cold water and drying them on a line, however, reduces the use-phase emissions by 90%.

然而，用冷水清洗和挂在一根绳子上晾干可以减少90%的使用阶段的碳排放。

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We are currently in a not-so-cold phase of an ice age - The Quaternary Ice Age.

BBC: Looking for the greenhouse signal

Cartwright has described that system, now entering its second study phase, as a key component in transforming the aging Cold War nuclear weapons stockpile.

CENTERFORSECURITYPOLICY: STRATCOM: Safe, reliable deterrence critical

This pole-centred roundel of warm-in-cold is symptomatic of what climatologists call the negative phase of the Arctic oscillation (AO).

ECONOMIST: Britain��s cold snap is explained by the Arctic oscillation