We must ascertain the usual customs of the local people and arrange accordingly.

我们必须了解当地人民的风俗习惯,作出相应安排。

I ascertained that she was dead.

我断定她已经死了。

I'm going to ascertain the truth.

我要查明真相。

It is ascertained that the PABA may be N-dimethylated using dimethyl sulfate as a methylation agent.

确定以硫酸二甲酯为N——甲基化剂,对对氨基苯甲酸PABA进行N——二甲基化.

Inference, which includes apodictic inference and probable inference, is the chief thought pattern of ascertaining case quality.

推理是到明案件性质的主要思维形式，它包括必然推理和然推理。

A method to ascertain airtightness of regulable refrigeratory, airtightness material selection and a way to made air retaining wall were discussed in this paper.

论述了气调库气密性的确定方法,气密材料的选择及气密层的做法,介绍了用正压法检测气调库气密性的具体操作过程,并给出了国内外的不同气密性标准。

Throughout the classical period they believed that man does not create the mathematical facts; they preexist. He is limited to ascertaining and recording them.

在整个古典时期，他们相信数学事实不是人创造的，而是先于人而存在的，人只要肯定这些事实并记录下来就行了。

The previously unidentified objects have now been definitely ascertained as being satellites.

原来所说的不明飞行物现在已证实是卫星。