1·Leaves are turning yellow.
树叶在逐渐变黄。
2·The leaves were turning yellow.
那时叶子正在变黄。
3·The leaves are turning yellow.
树叶慢慢地变黄了。
4·Leaves are turning yellow in autumn.
秋天到了，树叶变黄了。
5·I found that the leaves were turning yellow.
我发现树叶变黄了。
6·Autumn coming, leaves are turning yellow gradually.
秋天到了，树叶慢慢的变黄。
7·Leaves are turning yellow, which means autumn is coming.
树叶正在变黄，这意味着秋天就要来了。
8·“All the world is turning yellow, I suppose, ” said they, —and perhaps they were right.
“整个世界都在变黄啦！” 它们说。
9·Finally, there were 66 differential fragments chosen from, 20 of them belonged to green fruit and 46 belonged to turning yellow fruit.
差异表达的片段共66条，其中46条来自子黄绿色柿果，20条来自于绿。
10·The time of turning yellow related to heat condition both the Cold temperate perhumid cold conifer forest and the Frigid perhumid rain tundra alpine meadow.
而在寒冷潮湿多雨冻原、高山草甸类草场，热量条件是影响牧草返青期的主要因子。