东北地区的大兴安岭、小兴安岭和长白山区，是中国最大的天然林区，到处是望不到边的红松、落叶松、黄花松等针叶林和白桦、柞树、水曲柳、杨树、榆树等阔叶林。
The Greater Hinggan, the Lesser Hinggan and the Changbai mountain ranges in the northeast are China's largest natural forest areas.
在同一林型内，底物质量高的混合叶片其分解率和养分元素释放率均大于底物质量低的白桦叶片；
Compared with birch leaves, mixed leaves had a significantly higher substrate quality and showed a substantially faster decomposing rate and nutrient release rate.
结果表明，落叶松人工林的林冠截留率最大，表现出比天然白桦林、天然黑桦林和天然阔叶混交林具有较强的蓄水和拦截功能。
Compared with natural secondary forests of birch, Dahurian birch, and broadleaf tree mixed one, larch plantation showed higher sluice function due to its higher canopy interception percentage.
美国诗人弗罗斯特的《摘完苹果之后》、《白桦树》和《雪夜林畔》这三首代表作表明了他对现实和理想的态度。
Three poems written by an American poet Robert Forst show Frost's consistent attitude toward the fact and the dream.
树种以油松、云杉、白桦、杨、柳为主，经济林有苹果、梨、桃、杏等，野生牧草种类较多，近100种。
Tree species in Chinese pine, spruce, birch, Yang, Liu mainly forests are apple, pear, peach, apricot and so many kinds of wild grass, nearly 100 species.
温湿度的交互作用共同解释落叶松人工林土壤呼吸日变化变异的86.4%，白桦人工林的97.4%。
The regression model fitted by temperature and moisture can explain 86.4% of the diurnal changes of soil respiration in larch plantation, and 97.4% of birch plantation.
温湿度的交互作用共同解释落叶松人工林土壤呼吸日变化变异的86.4%，白桦人工林的97.4%。
The regression model fitted by temperature and moisture can explain 86.4% of the diurnal changes of soil respiration in larch plantation, and 97.4% of birch plantation.
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