Yet the past year, the year of the Ox, turned out to be full of fluctuations and changes.

刚过去的牛年，充满起落和变化。

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Taken together, the two observed that circulation changes accounted for "virtually all" of the year-to-year changes in springtime Antarctic ozone, Salby and colleagues write.

综上，环流变化解释了春季发生在南极臭氧层的所有年际变化，Salby及其同事们写道。

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Year-on-year growth rates conceal this bounce; to spot the turning-point, look at quarterly changes.

比去年同期增长率掩盖了这一反弹事实，为了体现这一转折点，我们来看看各季度变动。

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During the study period most countries had greater temperature changes from year to year than they have had historically.

VOA: special.2011.05.17

Doctor Ruhli says researchers used this method to study changes in the tuberculosis bacteria from two thousand year-old mummified tissue.

VOA: special.2010.06.29

Once he follows through on constitutional changes approved by the referendum, he will be allowed to run for another three-year term and run again after that if he likes.

VOA: standard.2009.08.14

And many agronomists hold that relying on year-to-year yield changes for modelling exaggerates the damage due to longer climate shifts.

ECONOMIST: Climate change and crops

The 23-year-old Briton said he was "looking forward to tackling" the changes to next year's cars.

BBC: Hamilton welcomes new regulations

Thousands of farmers continue to leave the land every year, responding to technological changes that have doubled agricultural productivity over the past half century.

ECONOMIST: True grit | The