注意，在物理学里面，势可以加上或者减去一个常数。
Remember, in physics, the potential is defined up to adding or subtracting a constant.
最大值加上或者减去最小值只产生极小的差异。
The maximum plus or minus the minimum makes minute difference.
这项技术使用电脑程序来追踪和计算粒子移动的快慢，然后每一分精确的加上或者减去20，得出NPR。
This technique uses a computer program that tracks and calculates how fast particles move, and is accurate to plus or minus 20 per cent, reports NPR.
这种价格变化限制就是，在头一天收盘价中加上或者减去限定数，得出的结果就是当天的价格的上下限。
The price change limit is added to and subtracted from the previous day's close, and the results remain the upper and lower price boundary for the day.
所有特定尺寸都只是近似值。除非特殊说明，否则最不重要的数字的不确定性体现在加上或者减去一个单位。
All dimensions specified are approximations only. Unless stated otherwise, the least significant digit is uncertain by plus or minus one unit.
或者我们可以写为，加上压强p,du, plus, external, pressure，乘以dV减去环境温度T乘以dS小于零。
Or we can rewrite this as du dV minus t surroundings dS is less than zero.
或者我们可以写为，加上压强p,du, plus, external, pressure，乘以dV减去环境温度T乘以dS小于零。
Or we can rewrite this as du dV minus t surroundings dS is less than zero.
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