自然落叶;
例句:
1、
The effect of leaf fall decomposition for 8 tree species on soil microorganisms was studied.
研究了8个树种凋落叶分解对土壤微生物数量和组成的影响.
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2、
3、
Leaf fall The shedding of leaves , usually associated with a fall in AUXIN concentration.
落叶:即树叶的脱落, 常伴植物激素浓度的降低.
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