而水位的数字化与模拟观测，因其观测的原理存在差异，虽然二者的趋势变化一致、内在质量相当，但其精度和稳定性却存在较大差异。
In water level, analog observation and digital observation are difference in nature. Two kinds of data are consistent in trend and natural quality but different in stability and accuracy.
这些都相当危险，因此控制好汽包水位是保证锅炉正常运行的重要环节。
These are quite dangerous, so the drum water level control is necessary to ensure normal operation.
蓄电池水位相当低了，需要加些蒸馏水。
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