尽可能避免深夜独自行走，尤其是女学生。
Wherever possible, avoid walking alone late at night, especially girl students.
克拉拉希望她能独自行走，并且海蒂能够扶着她。
Clara hoped then to be able to walk alone, with Heidi for her guide.
到目前为止，关于他是否独自行凶或有同谋的这个关键问题，挪威警方尚未给出结论。
The Norwegian police have yet to answer conclusively the vital question of whether he acted alone or with accomplices.
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