说话是最平常的事,我们知道,说话的时候人的声带振动造成了声波,声波在空气中传播,这才能被耳朵听到。其实,声波不仅可以在空气中传播,而且可以在水里传播。而且在水中传播的速度更快,其大约为在水中传播速度的四倍。第二次世界大战期间,美国和苏联的科学家分别发现,在大洋深处 Speaking is the most common thing, and we know that when people speak, the vocal cords vibrate causing the sound wave to spread in the air, which can be heard by the ear. In fact, sound waves can not only spread in the air, but also spread in the water. It also spreads faster in water, which is about four times faster than water. During the Second World War, scientists from the United States and the Soviet Union found, respectively, deep in the ocean