依照惯例的英文：
according to usage

参考例句：

By convention, north is at the top of most maps.
依照惯例，北方位于大多数地图的顶端。

Is it customary to tip waiters in your country?
在贵国依照惯例是否应该付给服务员小费

according是什么意思：
adv.根据；按照
adj.相符的，相应的；和谐的

Cut the coat according to the cloth
量布裁衣

Judge not according to the appearance
不要以貌取人

Arrange the exhibits according to size.
将展品按大小排列。

Act according to circumstances
因地制宜

The two superpowers reached an accord.
两个超级大国达成协议。

usage是什么意思：
n. 使用；用法；惯例

This is not in agreement with standard English usage.
这不符合标准英式用法。

It's not a word in common usage .
这不是一个常用词。

He was a stickler for the correct usage of English.
他非常注重英语的正确使用。

It's a book of English phonetics,grammar and usage in one.
这是一本英语语音、语法和习惯用语结合为一体的书。

Generalization, Dependency, Binding, Refinement, Trace, and Usage
归纳、依赖关系、绑定、优化、跟踪和用法