On foggy days, sailors cannot see far.
一到雾天，水手们什么都看不清。
Ships blow a deep horn to be heard.
轮船就拉响低沉的大汽笛。
Low sounds travel much farther.
低沉的声音呀，能传出去特别远。
The deep horn tells others, Here I am.
这低沉的汽笛，就像在说我在这儿呢。
Other ships hear it and keep away.
别的船听见了，赶紧绕开走。
It keeps boats from crashing into each other.
这样一来，船和船就不会撞上啦。
