It is cool in autumn.

秋天很凉爽。

同一单元的其他句子

• The weather is sunny today.今天天气晴朗。
• Is it rainy outside?外面下雨吗？
• Please bring an umbrella.请带一把雨伞。
• It is very cold today.今天很冷。
• The wind is strong.风很大。