rollerKK [ˈrolɚ] ｜ /ˈroʊlɚ/
GEPT 中高級
C2noun
a cylindrical device used to curl hair
She used a roller to curl her hair for the party.
C2noun
a cylinder that rotates
The baker rolled the dough with a wooden roller to make it thin and even for the pie crust.
C2noun
a small wheel (such as on a roller skate)
She replaced the old broken rollers on her office chair with new ones.
B2noun
a type of ground ball in baseball that rolls along the infield
Hitting a roller to the infield is a great way to advance base runners.
滾地球（棒球）
C1noun
a bird found in the Old World that tumbles or rolls in flight, related to kingfishers
As we walked in the forest, we suddenly saw a roller bird tumbling in the air and we were amazed by its acrobatics.
翠鳥科翻滾鳥
C1noun
a pigeon that can perform backward somersaults in flight or on the ground
I was amazed to see a roller performing backward somersaults in the park.
C1noun
a long and heavy ocean wave as it moves toward the shore
The surfers were thrilled to catch the rollers that were coming in, one after another, at high speed.