Language Points:
1.Caribbean : 加勒比海
2. anyone who’s been there
who has been there 这是由who 引导的定语从句，修饰anyone.
3. balmy :adj. Am.E:“barmy”, soft and warm, wild （褒义） 温和的，和煦的
a balmy climate 温和的气候
a balmy winter 温暖的冬天
4. equable adj. （温度）稳定的，均匀的
The temperature here is equable, neither very hot nor very cold. 这里的气温很稳定，不冷也不热。
5. extreme : n. （常用复数）极端
an extreme of luxury 极度奢侈
experience the extreme of sadness and joy 经历极度的悲喜
go/ be driven to extremes： 走极端
in the extreme： 极度地，极端地
the opposite extreme / the other extreme 另一极端
He has been generous in the extreme .他极度慷慨。
Sometimes he eats too much and sometimes he eats nothing. He goes from one extreme to the other. 他有时吃太多，有时不吃，从一个极端走到另一个极端。
extreme—mark: 最高温度
6. mark: n. 标记，符号
make a mark 做记号
an exclamation mark 惊叹号
punctuation marks 标点符号
birth mark 胎记