roller

• 名词，指能旋转的圆柱体或轮子，用于多种语境，如棒球中的地滚球、长长的海浪、溜冰鞋上的小轮子、卷发的机械圆筒，或一种以翻滚飞行为特点的鸟或鸽子。

A noun referring to a cylinder or wheel that revolves, used in various contexts such as a grounder in baseball, a long sea wave, a small wheel on a skate, a mechanical cylinder for hair curling, or a type of bird or pigeon known for tumbling or rolling in flight.

1. Rolling grounderB2informalamericansport

   A baseball hit that rolls along the infield ground.

   滚地球

   • The batter hit a slow roller to the shortstop.
   • He fielded the roller cleanly and threw to first.
   • A tricky roller bounced over the pitcher's mound.

   同义词dribblerground ballgrounder

2. Large ocean waveB1formal

   A long, heavy sea wave that rolls steadily towards the shore.

   巨浪

   • The surfers waited for a big roller to ride.
   • A massive roller crashed onto the beach.
   • The ship was lifted by a powerful roller.

   同义词billowbreakercomberswell

3. Small wheel without spokesA2formalsport

   A small, solid wheel used in devices like roller skates or inline skates.

   滚轮

   • The roller skate has four rollers on the bottom.
   • He replaced the worn-out rollers on his skates.
   • The roller on the skateboard needs to be tightened.

4. Revolving cylinderB1formaltechnical

   A cylindrical object that rotates, often used in machinery or tools.

   滚轮

   • The paint roller made the job much faster.
   • The conveyor belt runs on a series of rollers.
   • The printer's roller needs to be cleaned regularly.

   同义词barrelbobbincylinderdrumpulleyreelspool

5. Hair curlerA2informal

   A cylindrical tube used to curl hair by winding strands around it.

   发卷

   • She put rollers in her hair before going to bed.
   • He used hot rollers to create soft curls.
   • The hair roller set came in different sizes.

   同义词curlerhair curler

6. Roller birdC1formalscientific

   A type of Old World bird known for tumbling or rolling in flight, related to kingfishers.

   三宝鸟

   • The roller bird performed an acrobatic display in the sky.
   • We spotted a colorful roller perched on a branch.
   • Rollers are known for their distinctive rolling flight pattern.

7. Tumbling pigeonC1informalscientific

   A breed of pigeon that performs backward somersaults in flight or on the ground.

   翻跳鸽

   • The roller pigeon tumbled gracefully in mid-air.
   • He breeds roller pigeons for their unique flying tricks.
   • A roller pigeon can execute multiple somersaults in a row.

   同义词tumbler