求翻译：在此过程中发现：1）当铸件填充率达到98%时，其凝固分数开始增加，即开始凝固，这会造成在铸造结束时在浇口处出现浇不足的质量缺陷，因此，在实际生产中必须提高合金液体的浇注温度或在浇注时注意及时补缩；是什么意思？

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In the process discovered: 1) when the castings filling rate reaches 98%, scores began to increase its solidification, began solidifying, which could cause a cast appeared at the gate at the end of quality defects of cast-in less than, so in practice need to improve the alloy pouring temperature of

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