我不开心,这个是既定的事实。
Another established fact of this industry is the increase in movie duration during this period of time.该行业另一确定的事实是,在这段时间中,每部电影的长度变长。
And it's an established fact that trouble sleeping is also one of the major triggers of relapse among recovering alcoholics.而人们戒酒难的原因之一便是睡眠问题,这已是不争的事实。