那是照相机快门声。
又何况，这老门槛迎来的并不是它旧日的主人，它听到的大抵是游人的感慨和照相机的快门跳动的“咔嚓”声。
Moreover, this old threshold is not ushered in its old master, it is probably to hear the feelings of visitors and the camera's shutter beating the "click" sound.
宣誓就职仪式快速完毕，没有喧闹，只有照相机的快门声和其他媒体设备的响声。
The ceremony took place quickly and without fanfare, except for the whirring and clicking of cameras and other media equipment.
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