备份: backup...
贯穿: to run through, a connecting thread from beginning to end, to link...
背: carry on one's back, to be burdened, to carry on the back or shoulder, learn by heart, the back of the body...
交换: to exchange, to swap, to switch (telecom), commutative (math), to commute...
轻视: contempt, contemptuous, to despise, to scorn, scornful...
身材: stature, build (height and weight), figure...
首要: the most important, of chief importance...
来历: history, antecedents, origin...
有声有色: having sound and color (idiom); vivid, dazzling...
螺丝: screw...
