结论：胎儿出生体重与孕期体重指数的变化有较好的正相关性。
Conclusions: There is a positive correlation between fetal birth weight and maternal body mass index.
更糟糕的是，变化无常的食品价格指数令人吃惊地达到14.5%。
Worse still, the volatile food index increased to an astonishing 14.5 percent.
价值指数用以度量某些变量的价值总量变化。
A value index measures general changes in the total value of some variable.
研究了磁体的指数损耗随电流变化的趋势。
The trend of the index loss of the magnet with increasing current was studied.
通过与基数100的比较可以很容易看出以后的指数变化。
Through comparison with the base number, one may easily see the future changes in index.
通过与基数100的比较可以很容易看出以后的指数变化。
Through comparison with the base number, one may easily see the future changes in index.
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