翻译下列句子： 1.The chance is that one smoker in four will die from smoking. 2.The potato is another plant that was taken back by early travelers. 3.The problem with electrical signals is that they get weaker and weaker as they travel along metal wires. 4.It is believed that before writing was developed, people in China used to keep records by putting a number of stones together. 5.恐怕这台旧收音机没法修了