a rule of thumb

As a rule of thumb, a cup of filter coffee contains about 80mg of caffeine.

凭经验估计，一杯过滤咖啡约含80毫克咖啡因。

As a rule of thumb , the minimum device feature is about 4 times the beam diameter.

一般来说, 最小器件图形大约是电子束直径的4倍.

As a rule of thumb, a one - cent - a - gallon gasoline tax raises $ 1 billion.

一般情形是, 每加仑加汽油一分钱的税可以征收10亿元.

A rule of thumb is to allow flexibility with length.

一条经验法则是允许灵活性和长度.

As a rule of thumb, the higher the better.

就想拇指规则一样, 越高越好.

Many corporations employ a rule - of - thumb and maintain cash balances at some multiple of daily sales.

许多公司聘用一些日均销售额多一的规则拇指和保持现金余额.

As a rule of thumb , never mix Synthetic and Mineral oil based lubricants.

请牢记永远也不要把合成润滑油与矿物润滑油混用.