求翻译：目前国内外养分研究主要集中在森林受限制养分、养分损失、枯落物分解和森林C平衡问题上，对森林土壤养分的研究极为活跃。是什么意思？

Study at home and abroad mainly in the forest nutrient limited nutrients, nutrient loss, litter decomposition and forest C balance, the study of forest soil nutrients is extremely active.

The current domestic and international nutrient research focused mainly on forest restricted nutrients, nutrient loss, withered Lok property decomposition and forest C balance of forest soils, nutrients are extremely active in research.

At present the domestic and foreign nutrient research mainly concentrates in the forest is limited the nutrient, the nutrient loses, withers and falls the decomposition and in the forest C balanced question, is extremely active to the forest soil nutrient research.

At home and abroad the nutrient research mainly focus on forest litter decomposition in limiting nutrient, nutrient losses, and forest c balance issues, research on forest soil nutrient is extremely active.

Study at home and abroad mainly in the forest nutrient limited nutrients, nutrient loss, litter decomposition and forest C balance, the study of forest soil nutrients is extremely active.