可以帮我解释一下这段话的意思吗（英语-中文）
W:good morning.Do you have anything to declare?
M:No.I've only been abroad for a few days.That's why I came through this gate.The notice up there says "nothing to declare"
W:OK.Go ahead,please
对话每个单词意思我知道..可是这段话的意思我不理解诶..为什么那个男的看到上面写着没东西要宣布就走进了那个大门?
我知道他从国外回来需要进过海关.但是这段对话逻辑上不理解...
是不是我理解上出了问题...
男的说That's why I came through this gate.The notice up there says "nothing to declare"
这一句话的逻辑上我完全不理解..