我们自经年累月的谈判中获取了许多经验，也学得了教训。
We have gained a lot of experience and learned lessons from the years of negotiations.
在冰族和火族经年累月的争斗中，两兄弟戏剧般的人生也就此展开。
The drama of their lives unfolds against the backdrop of an everlasting feud, between the Ice Tribe and the Fire Tribe.
这项工作不是单方面的事，也不能一蹴而就，而是一项经年累月的艰苦工作。
This cannot be done overnight or unilaterally. It will require years of hard work.
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