① 地上７、８千メートルから１万メートルぐらいまでの高さ。
rapid economic growth (esp. that of Japan in the post-WWII period)
height difference; difference in elevation
period of rapid growth (especially Japan's period of rapid economic growth after WWII)
increase in sophistication; enhancement of functionality; increase in speed; upgrading
rapid economic growth (esp. that of Japan in the post-WWII period)
high-tech; high-technology
intelligent transportation system; ITS
highly skilled professionals (esp. as category of immigrants); highly talented personnel
sophisticated and professional work system
ITS; intelligent transportation systems
high-growth track; higher growth path
HATS; Harmonization of Advanced Telecommunication Systems