Lesson 11 这一讲关于季节的表达，季节成因。季节有哪些变化，还有身边的季节如何表达。
成因。
1.地球围绕太阳转
The Eearth travels around the sun
2.地轴是倾斜的。
The earth axis is tilted .
南北不同天气现象
1.when the northen hemisspere is tilted toward the Sun ,it s summer .
2.When it's winter in China,it's summer in Australia.
四季的天气
冬天
it is really cold
its chilly in winter in shanghai
it is freezing (cold ) outside.
夏天
Every day is hot and humid(潮湿）
秋天
it is cool in fall
The weather is cool is autumn
春天
In spring ,it is warm
表示季节
in (the )+季节
in spring ,in summer.
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