查sunset发现OALD双解的一个优势
今天碰到一个句子，sunset of the new agreement.凭直觉知道，就协议来说，sunset肯定不是“日落”的意思，后来查了一下，许多词典没有给出其他解释，但是OALD双解很棒：
◆ a fixed period of time after which a law or the effect of a law will end （法律的）自动废止期，效力消减期
◆ There is a five-year sunset on the new tax. 新税种的有效施行期限为五年。
▲( -tt- ) sunset(sth) (of a law or the effect of a law 法律或法律效力 ) to end or to end sth after a fixed period of time （使）定期届满废止
◆ The tax relief will sunset after a year. 税款减免将在一年后废止。
看来，OALD的语料真是不服不行啊。 赞！这种词典使用心得帖多多益善~~ 这个 sunset 应该是一种隐喻性质的扩展用法。
相关词组：sunset provision | sunset law | sunset clause
21世纪大英汉词典 只明确给出了做 adj. 的义项。
OALD 的确比较全面，noun, adjective, verb 的意思都给了。 必應詞典： OUP的语料库不是盖的啊，ODE/NOAD就是依托语料库编写的。 由sunset联想到另一个字：lame duck
所有字典都在解作"不中用/遇上困境/(的)"时译作跛腳鸭，
而用作形容任期即將屆滿的官员/ZF时，就只有OALD仍用此词，于是在"having little real power"的意思之上多了一个"ineffectual, unsuccessful"的味道。
cf 五日京兆 https://www.ahdictionary.com/word/search.html?q=sunset&submit.x=31&submit.y=23
sun·set(sŭn?sĕt′)
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n.
1. The event or time of the disappearance of the upper circumferential edge of the sun as it sets below the horizon.
2. The sky as the sun sets: a rosy sunset.
3. A decline or final phase: the sunset of an empire.
4. Law The automatic expiration of a statutory provision on a previously established date, in the absence of reauthorization: The law's sunset was July 1.
adj.
Law Providing for an automatic expiration.
v. sun·set·ted, sun·set·ting, sun·sets
Law
v.intr.
To expire on a previously established date, as a statutory provision.
v.tr.
To provide for the expiration of (a program or agency) by means of a sunset provision.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2015 by Houghton Mifflin Harcourt Publishing Company. All rights reserved. @elusty 我截圖的就是簡體本 刚刚查了一下手机上的几本学习型词典，确实如LZ所言~~ 厉害啊，学习了 回去看一下
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