yellow jacket

• 一种具有明显黄黑斑纹的胡蜂（马蜂），以攻击性强和叮咬疼痛著称。也非正式地指为高可见度而穿的安全背心或外套。

A type of wasp with distinctive yellow and black markings, known for its aggressive behavior and painful sting. Also used informally to refer to a type of safety vest or jacket worn for high visibility.

1. Type of waspB1formal

   A common name for predatory wasps of the genera Vespula and Dolichovespula, known for their yellow and black markings and aggressive behavior.

   黄蜂

   • A yellow jacket flew into the picnic area and stung someone.
   • Yellow jackets are more aggressive than honeybees.
   • We had to call an exterminator to remove a yellow jacket nest from the attic.

2. Safety vestA2informal

   A high-visibility jacket, usually yellow, worn for safety in hazardous environments or low-light conditions.

   安全背心

   • The construction workers all wore yellow jackets on the site.
   • He put on a yellow jacket before cycling at night.
   • The emergency responders were easily spotted in their yellow jackets.