Through over 2 years research and practice, we resolve this difficult problem at last.
我公司经过两年的生产实践，完全解决了这个问题。
How to successfully resolve this difficult problem has become the focus attention of all parties.
如何成功破解这一难题已经成为各方关注的焦点。
If / As long as you keep (on) trying, you will be able to resolve this difficult problem sooner or later.
只要佝丌断努力，佝迟早会览决这丧难题?。
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