In your technical writing. Please!
What is a topic sentence, you ask? Since they no longer seem to cover that in third grade…
A topic sentence is the first sentence in a paragraph that provides the main idea of the paragraph. Essentially it introduces a paragraph and summarizes what the paragraph is going to say. It isn’t, “Now we turn to Table 2”. It isn’t, “[Author (DATE)] studies X.” What does Table 2 say? Why is it there? Why are you talking about Author (DATE)? What is the relationship to your paper? Convey this information in the first sentence of each paragraph.
The topic sentence should tell you why that paragraph is there. If you don’t know why that paragraph is there, then maybe it shouldn’t be.
This PSA brought to you by a grumpy rumbler who has had to do waaay too many referee reports recently.