Send me an E-mail when you have time. 你有空發(fā)電子郵件給我。
Some analysts argue that those who spend all day surfing the Internet should pay more than those who just send the occasional e-mail message. 一些分析家指出那些整天在網(wǎng)上沖浪的人的花費要比那些只是偶爾發(fā)發(fā)電子郵件的人多的多。