忽冷忽热用英文怎么说！

忽冷忽热用英文怎么说！

忽冷忽热的这个词语用英文有以下几种翻译 ：
sometimes cold and sometimes hot
sometimes cool and sometimes warm
cold and hot by turns
alternately cold and hot
如果表示对一个人的态度忽冷忽热，则可以说成
alternately cruel（ly）and kind（ly ）
sometimes cold(ly) and sometimes warm(ly)
如果表示对某件事忽冷忽热则可以说成：
by fits and starts

例句如下：
Keep sb in a state of uncertain expectation, treating him alternately cruelly and kindly
对某人时好时坏、忽冷忽热
When Mary had a fever, she felt cold and hot by turns.
玛丽发烧时，她感到忽冷忽热。
As you may know that most people in China learn English by fits and starts.
正如你所知道的，中国大多数人学习英语都是忽冷忽热

by fits and starts as you may know that most people in china learn english by fits and starts.  正如你所知道的，中国大多数人学习英语都是忽冷忽热。 cruelly and kindly keep sb in a state of uncertain expectation, treating him alternately cruelly and kindly  对某人时好时坏、忽冷忽热

指人的性格时， be subject to sudden changes of mood be sometimes a stranger and sometimes a good buddy 更地道的英文说法是 by fits ( and starts )

The weather is suddenly hot and cold. The temperature is varying hot and cold.