The English translation of "也就是" is "that is" or "which is." In this article, we will explore how to use "that is" and "which is" in different contexts to convey precise meanings.

That is, when we use "that is," it typically introduces an explanation or clarification of a previously mentioned concept. For instance, if someone mentions a person by name, you might use "that is" to provide more information about that person. Here’s an example:

She mentioned a friend named Sarah. That is, Sarah is the one who always brings us homemade cookies.

On the other hand, "which is" can be used to specify a particular item or element within a group or list. It often introduces additional information that helps identify the specific item being referred to. For example:

There are many types of tea available in the store. Which is, the green tea has a distinct flavor compared to black tea.

It’s important to note that both phrases can be used interchangeably in some contexts, but their usage can vary based on the sentence structure and the emphasis you want to place on the information being conveyed.

In summary, understanding when to use "that is" versus "which is" can enhance your writing by making your explanations clearer and more precise.