Hi @舒韬 张,
Thank you for reaching out to Microsoft Q&A forum!
Add new terms to an existing model of a translator in Azure Custom Translator. To do this, you need to upload a new dictionary document type that contains the new terms. A dictionary is a list of words or phrases with their translations that can be used to improve the accuracy of translations.
For more info, please look into this info: What is a dictionary?
Also see: Quickstart: Build, publish, and translate with custom models.
I hope this helps! Thank you.