So, that's just a single point. What about f equals minus one?
仅仅是一个点，那么f=-1呢？
F. P and A. P tank is single bottom structure.
艏，艉尖舱底部为单底结构。
Design according to F. O. tank protection requirements. use single handlebar operation to achieve Dynamic Position.
按燃油舱保护的要求设计，单手柄操作动力定位。
Never confuse a single defeat with a final defeat. ~ F. Scott Fitzgerald.
永远不要把一次失败和最终失败。~ F。史葛菲茨杰拉德。
Never confuse a single defeat with a final defeat. ~ F. Scott Fitzgerald.
永远不要把一次失败和最终失败。~ F。史葛菲茨杰拉德。
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