back moving spring 回位弹簧 ; 复原簧
Brake shoe back-moving spring 制动蹄拉紧弹簧
The Alaska team also found that when bears got moving again in spring, their metabolisms took several weeks to creep back to normal.
阿拉斯加团队还发现当熊在春天继续活动的时候，他们的新陈代谢要花几周时间才能回升到正常水平。
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He had a shop there for 15 years, before moving back to North Dakota this spring.
在那里，他开店15年，今年春天又搬回了北达科他州。
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