第4篇
61 civilization
62 It
63 showing
64 an
65 means
66 being visited
67 appointed
68 randomly
69 its
第5篇
70 ideas
61 developed
62 with
63 in
64 was
65 settlers
66 are speaking
67 before
68 learning
69 Actually
70 largest
第6篇
41 successfully
42 of
43 was asked
44 decision
45 who
46 himself
47 as
追答48 becoming
49 an
50 meaningful
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