核心词议：
n. 优先；居先
precedence 基本解释
n. 领先；优先权；地位先后，级别高低；位次
速记方法
速记技巧 词源记忆法 来自precede，先走，先于，-ence，名词后缀。引申词义优先权。
知识扩展
中文词源
precedence 优先权
来自precede,先走，先于，-ence,名词后缀。引申词义优先权。
中文词源： precedence 优先权 来自precede,先走，先于，-ence,名词后缀。引申词义优先权。 precedence
精选例句
1、 All existing supplies of helium ought to be conserved and released only by permit,with medical uses receiving precedence over other commercial or recreational demands.
现有的所有氦供给应该被保存下来，并且只有在获得许可的情况下才能释放，医疗用途优先于其他商业或娱乐需求。
常见考点例句：
- Government intervention has precedence and can help stabilise the system .
- 政府干预具有优先权，能够帮助稳定系统。
- As in the united states , domestic troubles in china have been taking precedence over foreign relations .
- 和美国相似，中国国内问题已经压倒外交成为优先处理的事务。
- Before tv took precedence .
- 在电视占主导地位之前.
- Brain scientists hypothesize that the right ear auditory stream receives precedence in the left hemisphere of the brain , where the bulk of linguistic processing is carried out .
- 脑科学家继而提出假设：右耳的听觉系统优先进入左半脑，而左半脑是大量语言处理进行的地方。
- Berlin may also be making a mistake by giving precedence to bilateral ties with china over joining the european commission 's attempts to establish a level playing field for european investments in china .
- 柏林可能还犯了一个错误不应该优先发展与中国的双边关系，而不与欧盟委员会一道，为欧洲在中国投资建立一个公平竞争环境而努力。
