轻的物体需要较少的阻力改变运动以及用较少的时间去开始运动。
Light objects have much less resistance to change of movement and thus require much less time to start moving.
但是，当数据不干净时，副本记录将被弃用，只需将较少的数据加载到数据库，这将减少加载时间。
However, when data is not clean, the duplicate records get dropped and there is less data to load into the database. This reduces loading time.
胶合剂所作的假体部位，用十多年后会松动，而全关节成形术对老年和活动较少的人，却有维持最长时间的效果。
Because the cemented prosthetic components often loosen over decades of use, total joint arthroplasty has the longest-lasting results in older, less active individuals.
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