fractionally       
adverb uk/ˈfræk.ʃən.əl.i/ us/ˈfræk.ʃən.əl.i/
 极少地|微小地|细微地|些许地|稍微地
by a very small amount
  Despite substantial price cuts, sales have increased only fractionally. 虽然价格大幅削减,销量只有些许的上升。 
 Temperatures in summer are fractionally higher. 夏天的气温稍微地高一些 
 See: fractional
 - More examples
- She turned her head fractionally toward the noise.
- The jobless rate dropped fractionally in June.
- She lowered her voice only fractionally.