偏偏: (indicates that sth turns out just the opposite of what one would wish) unfortunately, as it happened, (indicates that sth is the opposite of what would be normal or reasonable) stubbornly, contra...
交界: common boundary, common border...
迟迟: late (with a task etc), slow...
精益求精: to perfect sth that is already outstanding (idiom); constantly improving...
回收: to recycle, to reclaim, to retrieve, to recover, to recall (a defective product)...
双胞胎: twin...
授权: to authorize...
平常: ordinary, common, usually, ordinarily...
导向: to be oriented towards, orientation...
取决于: to hinge on, to be decided by, to depend on...
