It was the best of times, it was the worst of times,

it was the age of wisdom, it was the age of foolishness,

it was the epoch of belief, it was the epoch of incredulity,

it was the season of Light, it was the season of Darkness,

it was the spring of hope, it was the winter of despair,

we had everything before us, we had nothing before us,

we were all going direct to Heaven, we were all going direct the other way

in short, the period was so. far like the present period, that some of its noisiest authorities insisted on its being received, for good or for evil, in the superlative degree of comparison only.

我们就生活在这样一个两难的时代。

好在于我们想要学习各方面的知识，已经有很多的平台可以选择，

坏在于这样的平台有些多的难以选择。

统计学-数据科学-人工智能是我的选择。

The Johns Hopkins University Data Science Specialization on Coursera:

https://www.coursera.org/specialization/jhudatascience/1?utm_medium=listingPage

Statistics Learning

http://www.reading.ac.uk/AcaDepts/sn/ssc/media/sadc-training-pack/index.htm