The user can opt to trade speed of computation for a higher margin of error, but the app can generally get the error under 1 percent in less than a second.
Sarah explained the error to Trade Me and the seller.
莎拉向Trade Me和挖掘机卖家作出了解释。
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However, there are many problems, such as heavy working intensity, poor efficiency and high error probability in trade methods, which depend on reliability chart or FTA.