His dark eyes shone like polished glass; his arms and legs moved unexpectedly, as if attached to unseen wires. (Para. 13)
Meaning: His dark eyes were very bright; he moved his arms and legs suddenly as if they were connected to hidden wires.
polish: v. 1. make something smooth and shiny by rubbing
He polishes his new car every weekend. 他每个周末擦洗他的新车。
2. improve
He spent much time polishing his article before having it printed. 文章付印之前他花了许多时间来润色。
attach to: to fix something to something else
Attach the handle to the box. 把这个把手装到箱子上。
We attached a business card to the briefcase. 我们在这小提箱上贴了一张名片。