Comparison between a current share price, portfolio of shares or a stock index and the price of the same instrument, portfolio or index at a given time in the past.
指股票的现行价格、股票组合或某种股指，与过去某一时刻相同金融工具的价格、组合或指数间的比较。
2
To cultivate the right instrument of perception there must be no comparison for when you compare you cease to understand.
为了培养正确的觉知工具，不能比较。因为当你比较时，你就不在理解了。
3
The technical comparison shows that the laser centering instrument is superior to conventional centering methods in the installation and adjustment of equipments.