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たり, だり
1. -ing and -ing (e.g. "coming and going")
2. doing such things as...
3. expresses a command
4. to be
5. indicates completion or continuation of an action
表示同时发生的动作
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行方不明, ゆくえふめい
1. missing (of a person), lost, unaccounted for, whereabouts unknown
失踪,下落不明,去向不详