We ought to concerntrate on these noted or unnoted errors and make up for them .

我们应当关注这些已标记或是 未 标记错误，对其修改补充。

If fly ash content is higher than 15 % influence of fly ash on impact resistance of concrete is unnoted ;

粉煤灰掺量不大于15%时，粉煤灰掺量对 碾压混凝土的抗 冲 磨 性能影响 甚微；