增或减 meaning in English

m/l=more or less

The new individual will , in theory , be as fit as the parents , plus or minus a small variance caused by the mutation
理论上说来，新的个体是和双亲一样适应的，由于变异或增或减会有些微小的变化。
Triads may be major , minor , augmented or diminished according to the quality of the thirds between the bottom and middle note , and between the middle note and the top note of the three
根据最低音与中间音之间，中间音与最高音之间的第三音的性质，三和弦可分为大，小，增或减。
A course that lay between undue clemency and excessive rigour : the dispensation in a heterogeneous society of arbitrary classes , incessantly rearranged in terms of greater and lesser social inequality of unbiassed homogeneous indisputable justice , tempered with mitigants of the widest possible latitude but exactable to the uttermost farthing with confiscation of estate , real and personal , to the crown
方针要介乎过分的宽大与过于苛刻之间。在这个有着不自然的等级制度社会上的不平等不断地或增或减变动不已参差不的社会里，要实行公平一视同仁无可争辩的正义，也就是说，一方面尽可能广泛地采取宽大政策，另一方面又为王国政府锱铢必较地横征暴敛，包括没收动产及不动产。