名詞 indicator:

1. a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
   同義詞：index, index number, indicant
2. a signal for attracting attention
3. a device for showing the operating condition of some system
4. (chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction

1. He talks about economic growth as a great indicator for freedom, I agree with him.
   他論及經(jīng)濟(jì)增長是自由的一個(gè)有力的顯示器，我同意。
2. An indicator or a sighting apparatus on a plane table, used in angular measurement.
   旋標(biāo)裝置飛機(jī)控制板上的指示器或觀測儀，用來測量角度
3. A hand-held, button-activated input device that when rolled along a flat surface directs an indicator to move correspondingly about a computer screen, allowing the operator to move the indicator freely, as to select operations or manipulate text or graphics.
   鼠標(biāo)一種手用的、用按扭控制的輸入設(shè)備，當(dāng)在平臺上滑動(dòng)時(shí)可以相應(yīng)地移動(dòng)計(jì)算機(jī)屏幕上的指示箭頭，使得操作者可以隨意控制指示箭頭，由此來選擇項(xiàng)目、控制內(nèi)容或作圖

in.di.ca.tor

n.Abbr. indic.（名詞）縮寫 indic.
One that indicates, especially:
指示者：尤指起指示作用的人
A pointer or an index.
指示：箭頭或索引
An instrument used to monitor the operation or condition of an engine, a furnace, an electrical network, a reservoir, or another physical system; a meter or gauge.
指示器，記錄器：監(jiān)控發(fā)動(dòng)機(jī)、熔爐、電網(wǎng)、水庫或其它系統(tǒng)運(yùn)作狀況的儀器；指示板或儀表盤
The needle, dial, or other registering device on such an instrument.
指針：這些儀表上的針、盤或其它指示用工具
Chemistry Any of various substances, such as litmus or phenolphthalein, that indicate the presence, absence, or concentration of another substance or the degree of reaction between two or more substances by means of a characteristic change, especially in color.
【化學(xué)】 指示劑：任何一種具有下列功能的物質(zhì)，即能通過自身性質(zhì)的變化，特別是顏色的變化來表明另一種物質(zhì)的存在、消失或聚集，或可以表明兩種以上的物質(zhì)相互反應(yīng)的程度；例如石蕊、酚酞
Any of various statistical values that together provide an indication of the condition or direction of the economy.
指標(biāo)：任何一個(gè)統(tǒng)計(jì)數(shù)值，這些數(shù)值綜合在一起能表明經(jīng)濟(jì)的狀況或經(jīng)濟(jì)發(fā)展方向