遍历集合会用原来的集合完成，而在以后的操作中使用更新后的集合。
Iterating through the collection will complete with the original collection, while the updated collection will be available for future operations.
在1999年到2003年间，美国研究创业学的教授席位从原来的237席增长至406席，而在全球的其它地区，这个数字从271席增长至536席。
Between 1999 and 2003 the number of endowed chairs in entrepreneurship in America grew from 237 to 406 and in the rest of the world from 271 to 536.
不料这个时候，却出现婴孩的啼哭声。原来安然无恙的婴儿，竟一直盖在床底之下，而在屋里别处发现了一头狼的尸首，当然是被奋勇保护婴孩的格勒特咬死的。
He then hears the cries of the baby and finds it unharmed under the cradle, along with a dead Wolf which had attacked the child and been killed by Gelert.
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