值,The contract was declared null and void.
合同被宣布
效。
) 
法律效力； 失效的效的The contract was declared null and void.
合同被宣布效。
Drum machine changes would result in a null at the punner in an intermediate state.
卷筒
推力的保持兵会导
转轮在洋间状况处单程摆动。
The general event horizon formula of black hole is given from null hypersurface equation.
从零曲面方程出发,导出了黑洞视界面的普遍公式.
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