| 词汇 | rolling | 
| 释义 | rolling  adjective [ before noun ] uk/ˈrəʊ.lɪŋ/ us/ˈroʊ.lɪŋ/   (GRADUAL)    逐渐的;逐步的 gradual  The plan is for a rolling extension of the tax over the next ten years. 计划是在未来十年中将这一税种的征收范围逐步扩大。    (OF HILLS)    (山峦)平缓起伏的 (of hills) gently rising and falling  The train journey took us through a valley past rolling hills. 我们乘坐火车沿一条山谷穿过绵延起伏的山峦。  Idiom a rolling stone (gathers no moss)idiom  old-fashioned saying 滚石不生苔,来去真自在(表示经常在外游荡或老换工作的人可以不用担负责任,但是也居无定所) said to mean that a person who is always travelling and changing jobs has the advantage of having no responsibilities, but also has disadvantages such as having no permanent place to live  Hal was a bit of a rolling stone before he married and settled down. 哈尔以前生活有些漂泊不定,直到婚后才安顿下来。  | 
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