f one's free will

The Russian biologist G. F. Gause performed numerous tow-species experiments in the laboratory, in which one of the species became extinct when only a single kind of resource was available.

俄罗斯生物学家 G. F. Gause 在试验室进行了大量的两个物种的实验，试验中，当只有单一的资源时，其中一个物种将会灭绝。

Mrs. Thompson got two more letters from him with the last one signed, Theodore F Stoddard, M. D. (医学博士).

汤普森夫人又收到了他的两封信，最后一封的署名是：西奥多·F·斯托达德，医学博士。

Whereas for fluorine, fluorine is smaller than f minus is the one that's the outer shell shown here.

而对于氟来说，氟原子更小,与外部壳层在这的负一价氟离子相比。