利用者:Lifetime

My personal interest includes various aspects of science and engineering, as well as some disciplines in social science such as history and economy. Mostly reading English and Japanese pages.

科学技術、数学、電子工学、歴史と関心は広いのですが、深く掘り下げてというところが少なくて、あまり執筆は出来ませんが、よろしく。