The ornithologists made Vs with their thumbs and forefingers, measuring angles.鸟类学家们用大拇指和食指构成V形量测角度.Her flat head and nose were made by pinching the clay between the forefingers.她的平头和鼻子都作出捏食指之间的粘土....

n.食指( forefinger的名词复数 )...

forefingers的音标：...