这就是为什么今天我们要推出语音和视频聊天-就集成在gmail里。
That's why today we're launching voice and video chat — right inside Gmail.
这就是为什么今天我可能站在这里的起因。首先，我感激你们。
And that is why for me today is, first of all, the time to say thank you.
这就是为什么今天我在灌木草原会比在家中感到安全很多的原因。
This is why I feel so much safer today, in the bushveld, than I once did in my home.
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