1、我認為秋天是一年中最美的季節。
i think autumn is the most beautiful season in a year.
2、秋天時葉子變黃。
the leave turn yellow in autumn.
3、在秋天的晚上,我感到一絲涼意。
i feel a little cool in the autumnal night.
4、秋天裏樹木都是光禿禿的。
the tree were naked during autumn.