tan

• 描述黄褐色或晒后皮肤的颜色，也可指某些物品呈现的这种颜色。

Describes a yellowish-brown color, often referring to skin color after sun exposure or the color of certain objects.

1. Light yellowish-brown colorA2formal

   Describing a color that is a light shade of brown with a yellowish tint, similar to the color of tanned leather or sand.

   浅黄褐色

   • She wore a tan jacket over her dress.
   • The walls were painted a soft tan color.
   • He bought a pair of tan leather shoes.

   同义词beigebuffcamelecrufawnkhakisandtawny

• 多义词：皮肤经日晒后变成的棕褐色；类似黄玉的浅棕色；或直角三角形中对边与邻边之比（正切）。

A noun with multiple meanings: a brownish skin color from sun exposure; a light brown color similar to topaz; or the trigonometric ratio of the opposite side to the adjacent side in a right-angled triangle.

1. Skin browning from sunA2informal

   A brownish color of the skin caused by exposure to the sun's ultraviolet rays.

   晒黑

   • She got a nice tan during her vacation in Spain.
   • He spent the afternoon working on his tan by the pool.
   • Using sunscreen helps you get a tan without burning.

   同义词bronzesuntan

   反义词palenesswhiteness

2. Light brown colorB1formal

   A pale brown color, similar to the color of topaz or light leather.

   浅棕色

   • She wore a beautiful tan coat to the party.
   • The walls were painted a soft tan color.
   • His shoes were a classic tan leather.

   同义词beigebiscuitbuffcamelecrufawnkhakisand

3. Trigonometric functionB2formal

   In mathematics, the ratio of the length of the opposite side to the length of the adjacent side in a right-angled triangle.

   正切

   • To find the angle, you need to calculate the tan of the given ratio.
   • The formula uses tan to determine the slope of the line.
   • In trigonometry, tan is one of the basic functions.

   同义词tangent

• 动词，指用鞣剂将动物皮加工成革，也指皮肤经日晒后变成褐色。

A verb used to indicate the process of converting animal skin into leather by treating it with tannins, or to become brown or darker from exposure to the sun.

1. Convert hide into leatherB2formal

   To treat animal skins with tannic acid or other chemicals to produce leather.

   鞣革

   • The artisan tanned the cowhide to make a durable belt.
   • Traditional methods of tanning leather use natural bark extracts.
   • They tanned the sheepskin to create soft gloves.

   同义词currydresstaw

2. Become sunburned or darkerA2informal

   To become darker in color from exposure to the sun or wind.

   晒黑

   • She tanned quickly during her vacation at the beach.
   • He tanned his arms while working in the garden.
   • They tanned their skin under the bright summer sun.

   同义词bronzebrownsuntan