之后就是一些特殊穿戴的锻炼了，比如帽子、手套、围脖、口罩这些。
One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.
，更多细节参见同城约会
至于刘强东能否成功、何时成功，仍有待时间检验。
The feature was first spotted by 9to5Google earlier this week, but it appears to be rolling out on a larger scale.