underscore

音标发音

I want to underscore the importance of this decision.
我要強調這份決議的重要性。
Default the value to an underscore ("_"); you can use any value here.
默認值爲一個下劃線 ("_")；這裡可以使用任意值。
By default, it matches only sequences of "keyword" characters (alphanumerics and underscore), and it has no deep sense of context beyond matching what’s immediately to the left of the cursor.
默認情況下，它僅匹配 “關鍵字” 字符序列（數字、字母和下劃線），除了與光標左邊進行匹配之外，它對上下文沒有深刻的理解。

These are students who felt under enormous pressure to perform, and I want to underscore the word 'perform,' as opposed to 'learn.'" She says the hardest lesson for society may be that young people will grow up lacking interest in learning.
- Now the bottom-- the little underscore in the bottom right hand corner represents the blank tile and just as with my thumbs I would move 4 down or maybe 2 to the right.
現在下方,右下方的下劃線表示空白片,我可以用手指將4移下來,或者將2移到右邊。
哈彿公開課 - 計算機科學課程節選
In any way, this story helps to underscore some important differences between Plato and Aristotle.
但這個故事的確,深刻地強調了一些重要的,介於柏拉圖與亞裡士多德之間的差別。
耶魯公開課 - 政治哲學導論課程節選

But it should underscore how frequently media reporting and economic reality are often miles apart.
FORBES: Hiring . . . Chicken or Egg?

to underline
the character _ on a computer keyboard, used to draw a line under a letter or word, and also used in file names where a space is not allowed

If something such as an action or an event underscores another, it draws attention to the other thing and emphasizes its importance.
If you underscore something such as a word or a sentence, you draw a line underneath it in order to make people notice it or give it extra importance.