What idioms are there with the word "cool"?

Ruthless, the heat of xia yang, the heat of cold gas, the coolness of five seasons, cruel.

1. ruthless?

Interpretation: cold and harsh, no feelings.

Sentence: He is really heartless.

2. The heat in xia yang [Xiyang Qushi]?

Explanation: The summer sun is suffocating.

Sentence: It's really hot in summer in xia yang.

3. Qi is cold and hot [Qi is cold and hot]?

Interpretation: It is cold in winter and hot and humid in summer.

Sentence: My brother asked me what it means to be hot and cold.

4. Is it cool in five seasons [wǔjǔzh chak]?

Interpretation: refers to the serious disaster in the Five Dynasties.

Sentence: My brother said that the coolness of five seasons is hard to write.

5. Ruthless?

Interpretation: violence, ruthlessness and ruthlessness.

Sentence: She is really heartless.