Some kind of time-card system must be introduced, to automate post-work processing. Or we'll have to increase work overhead to produce garbage statistic data. At the end, most of the work time will be spent in garbage in and garbage out.

碎碎念一則。頭部用嘴巴做管理，基本上 OK，但若是講太快手跟不上，那是一定會出問題的。