135 indicator
基础篇： meaning: something that can be regarded as a sign of something else
例句： Owning a property in first-tier cities is widely regarded as an indicator of wealth.
进阶篇：indicator 可数名词，意思是“指示器、指示牌、标志”。我们来学习它作为标志的用法。作这层意思讲, indicator 和 indication 可以同意替换。如果A is an indicator/ indication of B, 我们会习惯说 A 可以看出B 或 A是B的标志。我们可以用 indicator 替换 sign. 掌握这个词，可以提高我们口语和写作的表达质量。下面用几个例子来彻底搞定这个词。
在一线城市有用房产往往被视作富有的标志，我们可以说：
Owning a property in first-tier cities is widely regarded as an indicator of wealth/ affluence.
国家之间外交关系的正常化往往是从元首正式访问开始的。比如前几年奥巴马访问古巴，成为将近90年来第一位访问该国的美国领导人，就可以说：
Obama's visit to Cuba was an indicator of the improvement in relations between the USA and Cuba.
从员工流失率可以看出一个公司的文化和竞争力。
Turnover rates are a good/reliable indicator of a company's culture and competitiveness.
《经济学人》例句
1）Insects are indicators of ecosystem health.
2) When, in 2015, the government auctioned a site off the Massachusetts coast, the winning bid was $282,285--"a very clear indicator of a market that was basically dead", says Thomas Brostrom, who leads the North American business for Orsted, a Danish energy firm.
3) Nelson Blackely of Nottingham Business School says that a strong indicator of the lack of confidence in the sector is that last year saw the lowest number of sales of malls since the recession in 2008.
应用篇：
1）翻译： 出国旅行已经不再被视为富有的象征了。
Traveling abroad is no longer deemed an indicator of affluence.
Traveling abroad has become an unreliable indicator of wealth.
2) 造句：价格高不代表质量就好。(仿造翻译例句)
The high price is an unreliable indicator of high quality.
