數字沒有算得很精
沒磨平的不是動作而是數字：講出來的值還帶著毛邊，接近但不精確。
approximately · r · B2
used before a number, amount, or fact to show it is not exact, but close to being correct.
大約；大概
核心畫面
Picture a surface that has not been smoothed down — edges left as they came. Roughly is that unsmoothed quality turned into an adverb. Applied to how you handle something, it means without care or gentleness; applied to a number, it means the figure has not been filed down to an exact value, so it is close but not polished.
可以想成：一個沒有磨平的表面，邊邊角角就這樣留著。roughly 就是把這種「沒磨過」的性質變成副詞。用在動作上，就…更多收起
可以想成：一個沒有磨平的表面，邊邊角角就這樣留著。roughly 就是把這種「沒磨過」的性質變成副詞。用在動作上，就是沒有輕手輕腳、粗手粗腳地做；用在數字上，就是這個數還沒被磨到精確，差不多但不漂亮。兩個用法看起來差很遠，其實共用同一個「未經細修」的畫面。From the picture
Also in this word
roughly; harshly · r · B2
in a way that uses too much force; not gently or carefully.
粗魯地；用力地
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
roughlyadv/ˈɹʌf.li/
- 1
In a rough manner; without kindness, softness, or gentleness.
- They treated the prisoners roughly [...] slashing pitilessly with their whips to drive them as wretched animals before them.
- 2
Unevenly or irregularly.
- 3
Without precision or exactness; imprecisely but close to in quantity or amount; approximately.
- Satanism can be divided, roughly, into two branches: the Luciferians and the Palladists.
- Of the roughly 400 emerging infectious diseases that have been identified since 1940, more than 60% are zoonotic: ie they came from animals. Throughout history this has been common.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。