roundoff constant

例句：

1. 1. The computer's roundoff constant is set to 0.0001.
   计算机的舍入常数设置为0.0001。
2. 2. When calculating the area of a circle, we need to consider the roundoff error.
   计算圆的面积时，我们需要考虑舍入误差。
3. 3. The engineer used a roundoff constant to reduce the computational error.
   工程师使用了一个舍入常数来减少计算误差。