An operator, such as the + sign, is a character (or sometimes a short sequence of characters) that indicates a computational operation. In an expression, a term must be one of the following.

操作符，例如+，是一个字符(或者有时候是一小串字符)指明了运算种类。

youdao

Practical operation results show that the cluster analysis method can considerably improve the accuracy of short-term load forecasting.

实际运行结果表明：利用聚类分析法进行负荷短期预测，短期负荷预测的精度大大提高。

youdao

That is to let the layman, through the short term education practice and be able to play the operation.

这是让外行人，通过短期的教育实践，并能够发挥的运作。

youdao

Clearly the Kenyan government could not sit back and do nothing after the kidnappings but Kenyans hope this is a very short-term operation lasting maybe just a few days.

BBC: Kenya's incursion into Somalia raises the stakes

By the end of the year, when the Fed has sold the last of its short-term bonds, Operation Twist will have reached its limit.

ECONOMIST: The Federal Reserve extends Operation Twist

Operation Twist where the Fed sells short-term Treasuries and purchases longer-term Treasuries indicates that the Fed has no intention to raise interest rate targets until 2013 at the earliest.

FORBES: The Year Ahead for Fixed-Income Investors