n.易变；变化性；变异性
Additionally, there is much variability in the number of funds within a sector. 此外，在同一个行业中有大量的基金是易变的。
The answer is that diversification reduces variability. 答案就是分散降低了变异性。
Even a little diversification can provide a substantial reduction in variability. 即时一丁点分散也能造成变异性的显著降低。
