在以前，人们经常用信纸和公共电话保持通讯，现在人们通讯是通过手机和电脑

在以前，人们经常用信纸和公共电话保持通讯，现在人们通讯是通过手机和电脑。而且它们是非常方便的，有效的

結果 (英文) 1:

In the past, people often maintain communications with letterheads and public phones now communication by phone and computer. And they are very convenient, effective

結果 (英文) 2:

In the past, people often use letters and public telephone communication, people now communicate by mobile phone and computer.But they are very convenient, effective

結果 (英文) 3:

In the past, maintains regular communications with stationery and public telephones, communication through cell phones and computers now. And they are very convenient, effective