凋落

But, snuggling into its cosy hidey-hole, the tawny owl hasn't twigged that its cover has been blown by the fall of autumn leaves.

当秋天到来，叶纷纷凋落，它们的毛色变成和干一样黄褐色来帮助它们隐藏。

Decomposition of mixed foliar litters from the four typical plantitions in upper reaches the of the Minjiang River was studied by using the litterbag method.

摘要采用尼龙分解袋的方法，对四川岷地连、南松、糙皮桦和杉4种典型人工林凋落叶进行田间混合分解试验。