fractionalismn.分裂倾向；分裂政策fractionaladj.微不足道的；断片的；分数的；小数的fractional distortion部分畸变fractional extraction分馏萃取fractional programming分数规划Fractional Collections分段收集fractional selectivity分数选择性fractional flow of oil油的分流量fractional step scheme分步法fractional void volume[化] 自由柱容fractional dissolution分步熔解,分级溶解fractional free volume自由体积分数

1. The teeth on the gears mesh as they turn round.
   转动时齿轮上的齿与齿相啮合。
2. Dantes joyfully heard the key turn.
   邓蒂斯十分高兴地听到钥匙的转动声。