Even though a teacher or test examiner often encourages students to use more formal words, in daily speech native speakers don't necessarily speak that way. In fact, they tend to use expressions using the simplest words available to them.
儘管老師或考官常常鼓勵學生們使用更加正式的詞彙，但在日常會話中英語母語者不一定會那麼說。實際上，母語者傾向於使用對他們來說最簡單的詞彙來表達。
The phrase "What is that doing to" that we see in our dialogue today is a great example of that. When we ask "what does A do to B," we're asking "how does A affect B" or "in what ways does A affect B."
在今天的對話中我們看到的「What is thatdoing to (那對......有什麼影響)」就是一個很好的例子。當我們問「what does A do to B」的時候，就是在問「how does A affect B (A如何影響B)」或者「in what ways does A affect B (A以何種方式影響B)」。
It can be used to ask genuine questions, asin our dialogue, or it can be used rhetorically. Often, when we use it rhetorically, we add the word "even" to add emphasis.
這個表達可以用來提出真實的問題，比如在我們的對話中，也可以用於修辭。當用於修辭時，我們常會加入"even"來突出強調。