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。

youdao

F: Girls are enlisted, and it is not only to fight these battles, you know, which is horrible.

F：女孩同样会被招募，而且不仅将她们投入到战场上，还有更为可怕的。

youdao

Airmen at Holloman Air Force base, N.M., home to the Air Force's only operational F-117 wing, got to experience a new kind of rush as Hollywood invaded their base.

新墨西哥州霍洛曼空军基地的空军士兵们向空军唯一一支服役的F - 117联队机动，在好莱坞“入侵”他们基地之时获得一种全新的冲刺体验。

youdao

The I.M.F.predicts developing economies will continue to grow for the year, but only by about one and one-half percent.

VOA: special.2009.04.24

The only force acting on this guy is this little f.

这个物体只受一个力的作用,也就是 f

耶鲁公开课 - 基础物理课程节选

Your problem is to only look at the forces of contact on you, and that is just this f.

你只需要注意那些直接作用在这个物体上的力,那就只有 f 了

耶鲁公开课 - 基础物理课程节选

Critics carp that the plane is unneeded in a post-Cold War world and that we should, instead, only upgrade the F-15 and F-16 and wait for the proposed Joint Strike Fighter aircraft that's coming several years hence.

FORBES: Fact And Comment

Critics carp that the plane is unneeded in a post-Cold War world and that we should, instead, only upgrade the F-15 and F-16 and wait for the proposed Joint Strike Fighter (JSF) aircraft that's coming several years hence.

FORBES: Fact and Comment

The island can be reached from Manhattan on the F train, only three stops after Rockefeller Center, but according to a 2009 report on the island's infrastructure conducted by the department of urban affairs and planning at Hunter College, the subway was even then running at full capacity.

WSJ: Louis Kahn | Four Freedoms Park | Louis Kahn's Four Decades to Freedom | By Julie V. Iovine