bǔ jí
意思解释：（Filling collect）不属于一给定集合的所有元素的集合，该集合包含于含该给定集合的另一特定数学集合中。
迢递山河拥帝京，君王深在九重城。阳和不散穷途恨，江上几看芳草生。古往今来只如此，水流花谢两无情。共知人事何尝定，身贱多惭问姓名。…
Far away the land of country has capital of the Supreme Being, emperor is in greatly ninefold city. This world and do not come loose poor road hate, on the river a few see fragrant grass be born. Of all ages is only such, current flower thanks two callosity. Know human affairs why to decide in all, body cheap much feel ashamed asks a full name. ...
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