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1·Meteorologists say the warm spell is due to a combination of factors.

气象学家认为多种因素综合引起了如此温暖的冬天。

2·The study comes within days of announcements from climatologists that the world is entering a new el nino warm spell.

这项研究发布的几天前，气象学家就已宣布，全球正进入一个新的厄尔尼诺暖流期。

3·Heavy rain in June, and particularly flooding is usually associated with thunderstorms after a warm dry spell.

六月的暴雨，洪水泛滥总与一段干旱期后的雷雨相关。

4·Luck would have it that Fleming had decided not to store his culture in a warm incubator, and that London was then hit by a cold spell, giving the mold a chance to grow.

彷佛是幸运之神的眷顾，佛莱明决定不要把培养菌放在温暖的培养器中，然后冷峰侵袭了伦敦，给了霉菌生长的机会。