You can back test or paper trade for as long as you need before investing real money.

在你拿真金白银进行交易之前，你尽可以回溯测试或模拟交易。

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Familiarity with recording and playing back test scripts and an understanding of the content of test scripts.

熟悉录制和回放测试脚本，并理解测试脚本的内容。

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Most vendors sell their forex robots backing up their claims about robots profitability with back test results or on demo accounts.

大多数厂商出售其外汇机器人备份机器人盈利索赔回测试结果或模拟账户。

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Back on Earth, space scientists and engineers worked around the clock to design and test new ideas to help the astronauts survive.

VOA: special.2009.07.22

In Lycidas, Milton looks back at the Elder Brother's theodicy, and it's almost as if he's attempting to test its validity.

在这首诗中，弥尔顿回顾了《科玛斯》中哥哥的斯奥迪斯，似乎是在验证斯奥迪斯正确与否。

耶鲁公开课 - 弥尔顿课程节选

So as people in the back are answering these questions because they want to test my arm.

坐在后面的人回答我的问题,就是想要试试我的手臂力量。

麻省理工公开课 - 计算机科学及编程导论课程节选

In this back test he reshuffled every year to keep the roster current.

FORBES: The Magic Metric

So in the back test, for instance, the top 10% of companies ranked did 17.2% a year and the bottom 10% did 2.5% a year.

FORBES: Intelligent Investing

The back test was run on the U.S. stock market.

FORBES: 10 Magic Formula Canadian Stocks