LTA：长期平均值

“长期平均值”（Long Term Average，简称LTA）是一种广泛应用的数据统计指标，用于衡量某一变量在较长时期内的平均水平。该缩写形式LTA便于书写和快速交流，常见于数据分析、气象学、经济学及工程等跨学科领域，能够有效简化专业术语的表达。

The European Commission also released its monthly business and consumer confidence survey, which improved for the second consecutive month in December but remained well below its long term average.
欧盟委员会（europeancommission）也发布了月度企业和消费者的信心调查报告，此信心指数在去年12月连续第二个月上升，但仍远低于长期平均值(LTA)。
In addition, apart from last year, capex relative to overall industry sales has actually been below the long term average since 1998.
此外，自1998年以来，除去年外，资本支出与行业销售总额之比实际上一直低于长期平均值(LTA)。
On average, Shanghai stocks are trading at a price / earnings ratio of 16 for the current year, well below the long term average.
按今年预期盈利计算，上海股市股票的市盈率平均为16倍，远低于长期平均水平。
The long term average bed-load rate in unsteady flows is greater than that in equivalent steady flows; and the change of bed-load transport intensity is not in phase with the change of flow intensity.
非恒定流的推移质输沙强度与水流强度变化存在不同步的现象，长时间平均输沙率大于恒定流结果。
Characteristics of Long Term Average(LTA) Concentration Calculation Software ( ISCLT ) and Its Function Vindication
长期平均浓度计算软件（ISCLT）的特点及功能验证

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