相互问候彼此问安问候Greeting each other is a christian duty.彼此问安是每一位基督徒的责任.特例：As in their relationships with the opposite sex, they were found to be as 'attached and faithful', perching side by side, nesting together and greeting each other by nuzzling each other's beaks.在斑马雀在与异性的感情关系中，它们会表现得十分的“恩爱和忠诚”，并肩栖息，共筑爱巢，通过相互磨蹭对方的喙部以此作为示好。
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