So he keeps on studying after his English classes in order to prepare for life in America.
所以他在英语课下课后还继续学习,为以后在美国生活做准备。
It then sends these signals down an ordinary telephone line to another fax machine, which changes the signals back into the shapes of letters.
然后把这些符号通过一条普通的电话线送到另一台传真机上,传真机又把符号变为字母形状。