Definition+paragraph

==According to the Longman Dictionary, E-mail is a system that allows you to send and receive messages by computer, but this definition not make it really is. First, E-mail is not something you can hold in your hand, and a stamp is not needed to send it. E-mail is simply mail sent to its recipient through the Internet, Because of the technological advances of societ. It can be sent anyplace, anytime, as long as there is an Internet connection, and people can in __less__ time to get important letter or message. Second, use E-mail is very convenience and __safe__, you just need come up with a draft and __hit__ the send button and keep protect yourself E-mail password. Third, use E-mail can help people save __money__, people does not have to pay for the sometimes expensive postage price, but rather the monthly cost of Internet access. In the __future__, Email will replace all the letters and help people solve a lot of things.==