假如两个整数都是奇数或都是偶数，则它们具有相同的奇偶性；
If two integers are both odd or both even, they are said to have the same parity; if one is odd and one even, they have different parity.
仿真结果表明，相邻值的奇偶数柱塞泵的流量脉动系数相差无几，且流量脉动频率与柱塞数的奇偶性无关。
The simulating result shows that there is little difference in the flow coefficient between the adjacent odd and even piston pumps, and the flow pulsation frequency is independent...
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