Early next morning, she heard planes passing overhead and wondered how she could send a signal.
第二天一大早，她听到头顶上有飞机飞过，但不知道怎样才能发个信号。
Early next morning, she heard planes passing overhead and wondered how she could send a signal.
第二天清晨，她听到头上有飞机飞过，却不知道怎样才能发出信号。
Early next morning, she heard planes passing overhead and wondered how she could send a signal.
第二天清晨，她听到头上有飞机飞过，却不知道怎样才能发出信号。
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