There are always two sides to everything,and it is without exception for E-mail.
事物都有两面性（即好的一面和坏的一面）,电子邮件也不例外.
The advantages of E-mail are mainly as follows：it is faster than normal mail；it is safer and more reliable than normal mail；it can be accessed at any time,when an E-mail message is received,it can be opened and read at any time and anywhere on a computer that has internet access；E-mail messages can be sent to many recipients worldwide at once；E-mail is cheaper for persons and organisations that send e-mail to many recipients as this results in savings in stationery costs and postage.
电子邮件的优点主要如下：比其他信件更快；比其他信件更安全、更可靠；随时可以收发,当邮件信息收到时,在联网的计算机上随时随地都可以打开看邮件内容；电子邮件的内容可以一次性地发给世界各地的许多收件人；对于要向许多收件人传递信息的个人和组织而言,电子邮件更经济实惠（即更便宜）,节约文具及邮寄成本.
The disadvantages of E-mail mainly consist of the following aspects：persons must have access to the internet to send and receive e-mail; too many messages (usually spam) can be sent to a user creating a mail overflow; E-mail is a source for computers to become infected by viruses; users cannot send tangible items such as parcels by e-mail.
电子邮件的缺点则主要包括如下几个方面：人们只有先联网才能传收邮件；太多信息（通常指垃圾邮件）被传给用户,致使邮件泛滥；电子邮件是计算机感染病毒的源头之一；用户不能以电子邮件的方式寄送有形物品,例如包裹.
