然后，根据波浪中重力与浮力平衡、纵倾力矩之和为零这两个条件来求取横摇稳性力臂值。
Finally, the values of roll stability, in accordance with the condition of the balance between gravity and buoyancy of ship in waves and also with that the sum of trim moments is zero are obtained.
关于任一可逆循环热温比之和为零的推导，许多教材上的阐述存在着不够准确和过于简单的问题，本文提出一种比较严格的推导方法。
It is pointed out that in many textbooks, the derivation of the theorem that the ratio of heat to temperature amounts to zero in any reversible cycle is insufficiently exact and too excessively brief.
的任意有限多个诣零左理想之和仍为A的诣零左理想；
Sum of any finitely many nil left ideals of A is also a nil left ideal of A.
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