中国人：我不知道，这应该需要多长时间？

Chinese: I do not know. How long should it take?

youdao

我不知道任何显示电视本身或天然就对孩子有害的证据——这取决与他们观看什么节目、看多长时间。

I know of no evidence that TV is in and of itself harmful for children-it depends on what they watch and how much they watch.

youdao

我不知道这要花掉多少钱、花费多长时间以及这个软件最终会是个什么样子。

We don't know how much it will cost, how long it will take, or what it will ultimately look like.

youdao

But I don't really know about how long it would take people to hack, like, the general firewall

但我不知道人们具体要用多长时间才能穿过防火墙，

理想是当密码专家 - SpeakingMax英语口语达人