The f factor, which possesses an additional genetic unit, is also called sex factor or fertility factor . 具有附加的遗传单位-F因子，也叫性因子或育性因子。
W is attached to a bar, movable vertically around an axis a and suspended by the helical spring f . 摆锤W装在一根杆上，在轴A周围垂直移动，它由螺旋弹簧F所悬挂。
The upper limit on f quoted above already excludes such an admixture due to electromagnetic interactions . 上面引用的F的上限已经排除了由电磁相互作用引起的这种混合。
Cumulate plagioclase appears abruptly at the base of the f unit, which rests on an erosional disconformity . 堆积的斜长花岗石在位于侵蚀假整合之上的F单元的基底突然出现。
If you are ambitious, try this alternative procedure: note that f'(x)involves the heaviside stepfunction . 如果你有雄心的话，可以用另外步骤试之：注意f’（X）包含亥维塞阶梯函数。
It was noted that the f scale elicits in the respondent the tendency to agree with the items regardless of content . 他们注意到，F量表诱发了应答者同意那些项目而不管其内容如何的倾向。
Many texts define a hermitian operator as the following equation that satisfies for all well-behaved functions f and g . 许多教科书将厄米算符定义为对所有的品优函数f和g满足下式的算符。
a weak phosphoric acid made from florida rock containing 25% f gives a 54% acid containing 0. 4f. 用佛罗里达矿石制得的稀酸（含F25）可以浓缩成含F04的54酸。
He was an f branch man through and through, and his appointment perfectly illustrated the decisive shift in mis's center of gravity . 他是个纯粹的F处出身的人，他的任命充分说明了军情局工作重心的决定性转移。
When an oxidizing plasma is run in a system coated with fluorocarbon film, a substantial quantity of f atoms is released in the plasma . 当氧气等离子体在覆盖有氟碳薄膜的系统中起辉时，就会有相当数量的F原子在等离子体中释放。
