This is the 3684th most frequent Chinese word.
臂
"臂" means "arm" in English.
The word "臂" in this sentence refers to the anatomical part "arm," specifically the left arm of the person mentioned.
他的左臂受伤了，不得不打石膏。
His left arm was injured, and he had to wear a cast.
Here, "臂" refers to the robotic tool resembling a human arm, showcasing its application in technology and machinery.
机械臂帮助工人完成了生产任务。
The robotic arm helped workers complete production tasks.
In this context, "臂" is used to mean the arm of the person, focusing on the action of extending it as a form of communication or gesture.