龙先生说，之所以写下这段遭遇，是因为许多家庭都面临着母亲和自己一样的问题——如何在数字时代，为老人构建起一张放心的安全网，这个过程比想象的要更难、更长。
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Better accuracy than RNNT
Tracing and identifying the sources of an outbreak is a challenging task that can take months or years. Thanks to the Blockchain, however, companies now know exactly where their food has been—so they can trace its location and prevent future outbreaks.