He slipped a dog collar around Pinocchio's neck and tightened it so that it would not come off.
他把狗项圈套在皮诺乔的脖子上，把它拉紧，不让它掉下来。
I realized that the handrail would not come off, which meant we could no longer be able to replace the power supply and repair that instrument, which meant scientists could no longer look at the universe and find life on other planets.
