Wave's creators see E-mail as their main opposition. But might they face a challenge from an altogether different quarter?

海浪的发明者把电子邮件作为他们的主要竞争对手，但他们还可能面临来自其他不同竞争者的挑战。

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Homeowners may choose from double or triple low-E glazing, as well as different surface colors and finishes.

房主可以选择增加一倍或两倍低辐射玻璃，也可以选择不同的外观颜色和面漆。

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The marketing pages use a portal server and the product catalog USES an e-Commerce server — and each technology is from a different vendor.

营销页面使用门户服务器，产品目录使用电子商务服务器——而且这些技术来自不同的厂商。

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But members of the Digital Due Process Coalition say sending an e-mail should be no different from mailing a letter that is protected by law from being opened.

VOA: standard.2010.06.22

Last week I received e-mails from two different people, each of whom wanted to meet with me.

FORBES: Just Schedule It Already!

Traditional web growth sources are a bit different from mobile app growth sources e.g. app store SEO is much different than web SEO, and both offer some level of growth potential.

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Often, each e-mail is about something different from those that came before it or after.

FORBES: And Now for Something Completely Different: Context Shifting