释义:天之险在于高不可升,地之险在于山川丘陵。王公设险以保卫国家,险的功用非常大。
Fatigue is not the body's strike, but the imbalance of psychic energy accounts.
能源转型不仅仅是从化石燃料转向可再生能源,更是要用更少的排放提供更多的能源。
History does not long entrust the care of freedom to the weak or the timid.