Hereinto, DSU is shorted for database storage unit. It is one subsystem of communication based train control (CBTC) system.

Hereinto, related to the theory of reliance obligation, the most severely problem is that we can't obtain the notion of obligation from the reliance;

There are many ways to take to address those energy issues. Hereinto one of the practical choices is to develop renewable energy and increase the share of it in the energy consumption structure.