例句與造句

1. If a charge is applied to one spot on a styrofoam ball and the ball is suspended from an insulating silk or polyester thread, it will rotate so the charged spot is on the opposite side from the approaching charged PVC . With styrofoam, the charge stays at the spot it is applied and does not spread around the surface.
2. It's difficult to find insulating silk in a sentence. 用insulating silk造句挺難的