【be called 】：命令、召（至某处）
例：The ambassador was called back to london by the prime minister.
大使被首相召回伦敦。
例：Several candidates were called for a second interview.
几个候选人被通知去参加第二次面试。
【be called as】：称为（非固定搭配，词典上无有关例句，常见于文献写作中）
例：The fact our universe is accelerated expanding indicates that there is
a mysterious anti-gravity which was called as "dark energy" [6,7,8,9].
宇南加速膨胀的结果表明有一种神秘能量使宇宙在扩张，天文学家称之为暗能量。
例：IEEE instituted a standard for it, and the standard is IEEE1149.1
(that can be called as JTAG standard also). IEEE为其制定了相关标准,即IEEE1149．1标准(也称为JTAG 标准)。
