这个额外的按钮并不是因为功能而被删去的。 “Ratzlaff说道。
“The extra button wasn’t justified by the functionality, ” Ratzlaff said.
吐温明白自己形象的价值，并尽可能地保护它，因此自传中一些被删去的段落更精彩。
Twain understood the value of his image and went to some lengths to protect it. Some of the more fascinating passages in the autobiography are those that have been crossed out.
为了避免结果奇异，在优化过程中，给被删去的构件一个微小的截面积，使一个给定的拓扑组的结构维数保持不变。
In order to avoid a singular solution, we keep the dimension of the truss for a given topology unchanged by giving the truss member to be removed a tiny cross-sectional area.
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