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.