Finally the existence of the limit cycle is obtained by using the stability theory of the weak focus.

最后根据细焦点的稳定性判断出极限环的存在性。

youdao

I know, is to listen to Shinto, and not look at the world, but I still have weak focus on the reality and the feelings and pressure from around the eyes.

我知道，是去听神道，而不是看世人，可是我还是有软弱，注重现实的感受和来自周围的压力和目光。

youdao

Small telescopes see a lot of sky but can detect only strong signals. Large ones, which can detect weak signals, have a narrow focus.

大型的望远镜虽可以检测到微弱的信号，却只有很小的焦距。

youdao

Sometimes there is a strong focus on slavery but weak punishments, says I.L.O.official Roger Plant.

VOA: special.2009.06.08

The company lost about 10, 000 net subscribers due to a seasonally weak Q2 and focus on getting only high quality subscribers.

FORBES: Dish Disappoints With Subscriber Losses But Is Still Headed To $33

While current political discussions focus on our weak economy and drastically underfunded military, the debate on energy independence has stalled.

CENTERFORSECURITYPOLICY: Energy Independence Now

But the weak retail story was also in focus.

FORBES: The Fast Disappearing 'Santa Rally' And The 'Ghost Town' Which Is JC Penney