as a rule

通常, 一般说来

例句与用法：

As a rule he writes English very well, but occasionally unidiomatic expressions creep in.

他通常英语写得很好，可是偶尔会夹杂一些不合习惯的表达方式。

As a rule of thumb, you should cook a chicken for 20 minutes for each pound that it weighs.

凭经验估计，每磅鸡肉应烹调20分钟。

As a rule, I'm home by six.

我通常六点在／到家。

As a rule, it's the gentleman that holds out his hand to invite a lady to dance.

通常，是男士伸出手来邀请女士跳舞。

详细释义：

一般说来; 通常

As a rule, we get up about six o'clock.

我们通常六点左右起床。