The big problem for agriculture is not the number of people, but signs that farm productivity may be levellingout.
农业面对的大问题不是人口数，而是有迹象表示农业生产力已经开始持平。
2
He added that "a levellingout of economic activity is the first step toward recovery" -though he did not say when he thought this levellingout would take place.
他补充道：“经济活动见底是通往复苏的第一步。”但他未说明他认为何时会发生这种见底。
3
That will take some of the steam out of Asia's exports, which may already be levelling off.