The average age at which girls start puberty fell dramatically over the 20th century: While the average is now 12, although the average is now levelling off.
自从20世纪以来女孩青春期开始的平均年纪极度下降。而现在的平均年纪是12岁，虽然这个平均值仍然平稳。
This levelling off, coupled with a growing world population and increasing per capita demand for fish, spells trouble.
这种停滞不前加上世界人口不断增长和人均鱼品需求量的扩大都将造成问题。
That will take some of the steam out of Asia's exports, which may already be levelling off.
这可能会减少亚洲出口的动力，如今其出口可能已经在原地踏步。
Although the temperature on Ascension has not changed appreciably in the past 30 years, sea-surface temperatures upwind of it jumped by more than a degree in the 1980s before levelling off.
虽然在过去的30年间阿森松岛上的温度并没有明显变化，但该岛上风向的洋面温度在上世纪80年代跃升了1度以上，在那之后洋面温度趋于稳定。
On a quarterly basis, the savings rate had been rising before levelling off towards the end of last year.
以季度衡量，储蓄率一直处于上升通道，直到去年末才逐渐稳定。
On a quarterly basis, the savings rate had been rising before levelling off towards the end of last year.
以季度衡量，储蓄率一直处于上升通道，直到去年末才逐渐稳定。
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