意见是某人对于某件事的观点或想法，它是对某事的估计，判断或是评价。意见不等于事实，因为意见既没有被证伪，也没有被确认或证实。如果随后它被确认或证实了，它就不再是一个意见，而成为了一个事实。
It is an assessment, judgment or evaluation of something. An opinion is not a fact, because opinions are either not falsifiable, or the opinion has not been proven or verified.
评价胎儿包括胎儿体重和位置。对胎儿大小的估计，即使是超声学获得的结果经常都不准确。
Assessment of the fetus consists of estimating fetal weight and position. Estimations of fetal size, even those obtained by ultrasonography, are frequently inaccurate.
从而提出，可根据混凝上受载后的声发射特征来评价和估计混凝土材料的损伤程度。
Therefore, it is proPOsed that the damage degree of concrete can be evaluated and estimated by using AE characteristics.
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