Here scaling up risks may cause them to cascade rather than cancel out .
在这种系统里，规模增大的风险可能会彼此累加而不是相互抵消。
A shared account however shouldn 't cancel out individual accounts .
虽然如此，联合账户的存在不意味着要取消个人账户。
For serious sleep loss even 10 hours in bed may be insufficient to cancel out the negative effects .
对于那些睡眠严重不足的人，睡上十个小时可能都无法消除这些副作用。
But the learning curve rework and inevitable mistakes made with a totally new tool usually cancel out any benefit when you 're in the middle of a project .
