Six experts in forestry science and economics say forest growth is on the rise in some countries and the number is increasing 其中六位森林科学与经济专家的研究表明，越来越多的国家森林覆盖率都在提高。
2.
Six experts in forestry science and economics say forest growth is on the rise in some countries and the number is increasing 森林科学与经济学的六位专家说，在一些国家森林生长率一直在增长，而且这样的国家还在不断增加。
3.
Six experts in forestry science and economics say forest growth is on the rise in some countries and the number is increasing 森林科学和经济学领域的6位专家说若干国家的森林增长率正在稳步上升，并且这样的国家也越来越多。
