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| Windows Call (An app for making video calls) | |||
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| Windows Live Call (The Windows Live service that allows users to make computer-to-computer or computer-to-phone calls. Users must be signed in to Windows Live Messenger to use it) | |||
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| Call (An app for making video calls) | |||
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позив : 9 短语, 3 学科 |
| 微软 | 7 |
| 数学 | 1 |
| 经济 | 1 |