6.For example, invoking the addAll(Collection) method on an unmodifiable collection may, but is not required to, throw the exception if the collection to be added is empty.
7.If we look we may find that direction and goals can emerge in biological evolution from a mob of directionless and goal-less parts, without invoking vitalistic or supernatural explanations.
8.Be all gods and their offspring invoked to grant that this empire and this city flourish forever and never cease until stones float upon the sea and trees forbear to sprout in the springtide.
自己辩护。
约时报 (New York Times) 
切
劳、激动、感染、妊娠、分娩等。
义自己
不可更新的 集合调用addAll(Collection)，而如果要被添加的集合是空的，可以抛出该异常，但不是必须。
不能再用这个借口了。
创建者
鲁门。
，就是
