What are the characteristics of winter in the southern hemisphere? Please analyze it in full text.

1. The first paragraph of the article quotes the words of Zhao Da poets. What is the role of citing examples of Liu Zongyuan, Han Yu and Su Shi?

2. What does the sentence "But with the cross star, it can't be cooked overnight" mean? ?

3. What are the characteristics of winter in the southern hemisphere? Please combine the full text for analysis.

4. The article is full of emotion. Please analyze the emotions contained in the article with the text.

Analysis:

1.( 1) shows that the ancients in China seldom went deep into "Nan Man", and expressed that the impression of ancient China people on "Nan Man" was hot and desolate; (2) pave the way for the following winter in the southern hemisphere, thus highlighting the unexpected cold in winter in the southern hemisphere.

2. The stars in foreign countries can't make them sleep peacefully, which vividly shows the author's deep homesickness.

3.① Abnormally cold, empty and quiet; The sun comes late and goes early, and the setting sun is nowhere, in fact, it is northwest; ③ The night sky in the southern hemisphere is different from that in the northern hemisphere, and the representative constellation is Southern Cross.

4.① Surprised by the cold in the southern hemisphere; (2) rejoice in the snow-capped mountains in the southern hemisphere; ③ Surprise and admiration for the starry sky in the southern hemisphere; (4) Deep yearning for the homeland.