vast

Compared meaning: very big in size (adjective).

比较义项：巨大的，大的（形容词）。

• vast 本词

  Vast stresses extreme, almost boundless size, mainly for land, space, or quantity - stronger than big/large and not used for small physical objects.

  vast强调极其巨大、几乎无边无际的规模，主要用于土地、空间或数量，语气比big和large更强，不用于形容体积较小的具体物品。

  The Sahara is a vast desert covering most of North Africa.

  撒哈拉沙漠辽阔无边，覆盖了北非的大部分地区。

• great

  Great is more formal or literary for size or degree, common in fixed phrases about distance, effort or number rather than everyday physical objects; in casual speech it usually means excellent instead.

  great用来表示大小或程度时更正式、更文学化，常见于表示距离、努力或数量的固定搭配中，而不是日常具体物品；在日常口语中，great通常表示“极好的”。

  There is a great distance between the two mountain peaks.

  两座山峰之间相距很远。

• big

  Big is the everyday, informal word for size, used freely in casual speech about concrete objects like animals, houses or problems.

  big是日常口语中表示大小最常用的词，常用来随意地形容具体的物体，比如动物、房子或问题。

  That is a really big dog for such a small house.

  对于这么小的房子来说，那只狗真的很大。

• large

  Large is a neutral-to-formal synonym for big, preferred in writing, official or technical contexts and usable for amount as well as size.

  large是big的中性到正式的同义词，常用于书面语、正式或技术语境中，也可以用来表示数量而不仅仅是体积。

  The company reported a large increase in its annual profits.

  该公司公布了年度利润的大幅增长。

Vast, great, big, and large all mean big here, but strength and style differ. Vast is strongest, for huge areas. Big is casual. Large is more formal. Great is literary; in speech it usually means excellent instead, a meaning not compared here.

vast、great、big、large在这里都表示“大”，但语气强弱和使用场合不同：vast语气最强，强调面积或范围极其巨大；big最口语化，large更正式中性；great在表示大小或程度时偏文学化，日常口语中通常用来表示“极好的”，这个常用义在此不作比较。