[医]conventional method ;
例句:
Interpreters should bear the two principles in mind and give corresponding renditions in line with customary usage and practice.
译者应牢记这两大原则,依照惯用法和习俗进行相应的口译。
This is a book on modern English usage.
这是一本关于现代英语惯用法的书.
That expression has been sanctioned by usage.
那种表达方式在惯用法上已被认可.