The past is always constructed from the present.
高分子科学的进步依赖于理论与实验的结合。
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。
"To be forgiven is only half the gift. The other half is that we also can forgive, restore the lost, and mend the broken."