stock-in-trade

剑桥词典

the typical characteristics or behaviour of someone or something
典型特点；典型行为；惯用手法
The song was perfect for the soft vocals that are her stock-in-trade. 这首歌非常适合用她最为擅长的柔声唱法演唱。
old-fashioned
the tools and other objects that you need for your job
（某项工作的）用具设备 返回 stock-in-trade