roughly

almost, nearly, about, approximately, around, roughly

这些副词均有“大约，差不多”之意。
almost: 指在程度上相差很小，差不多。
nearly: 与almost含义基本相同，侧重指数量、时间或空间上的接近。
about: 常可分almost和nearly换用，但about用于表示时间、数量的“大约”时，实际数量可能多也可能少。
approximately: 多用于书面语，指精确度接近某个标准以致误差可忽略不计。
around: 多用于非正式场合，常见于美国英语。
roughly: 指按粗略估计，常代替about。

副词 roughly:

1. (of quantities) imprecise but fairly close to correct
   同义词：approximately, about, close to, just about, some, more or less, around, or so
2. with roughness or violence (`rough' is an informal variant for `roughly')
   同义词：rough
3. with rough motion as over a rough surface
   同义词：rough

1. The speaker was roughly handled by the mob.
   演说者受到暴民的粗暴对待。
2. The Antarctica is a continent centered roughly on the South Pole.
   南极洲是一片大致以南极为中心的大陆。
3. Roughly speaking, I would say that about100 people attended the exhibit.
   粗略地说来，我想大约有100人参观了展览。