在紫外光的照射下检查是否有细小的裂纹和腐蚀孔。

Under the irradiation of uv light to check whether there is a tiny cracks and corrosion holes.

youdao

将小波变化得到的动力响应的能量谱作为损伤检测的特征量，具有很好的灵敏度，能检测到复合材料容器中非常细小的裂纹。

The energy spectrum variations as the damage dynamics feature have good sensitivity. Therefore it can detect very tiny cracks in cylindrical composite vessel.

youdao

像是什么也没让他抓住似的：在一块土疙瘩上支起半边靴子，然后抓向某个“污点”或是某道细小的裂纹，最后突然弹开岩石上的双臂，朝某个方向直扑过去。

He seemed to be catching on nothing: propping his boot on a pimple, gripping a "smear" or a hairline crack, freeing both arms from the rock to make a lunge.

youdao