致腐蚀

The morphology and chemical compositions of I-SCC fractures of new zirconium alloy s were investigated by SEM and EDXA.

利用扫描电镜和EDXA对新锆合金碘致应力腐蚀的断口进行了形貌观察和成分分析。

With increasing number of hot-wall hydroprocessing reactors and extension of service time, the occurrence of polythionic acid corrosion, hydrogen induced spalling of weld overlay, temper embrittlement of base metal, hydrogen embrittlement and surface cracking etc.

随着国产热壁加氢反应器的数量不断增加和服役时间的延长，连多硫酸腐蚀、堆焊层氢致剥离、母材回火脆化、氢脆、表面开裂等时效损伤出现的情况越来越多。

However, Co-Cr alloy will be under various chemical and even electro-chemical reactions with surrounding materials while used in the complicated and relatively chemical active oral environment. The released metallic ions, generated from the consequent corrosions, not only affect the designed material properties, but also have negative effect on human body at different degree.

但义齿在行使功能时，Co-Cr合金会与周围复杂多变的口腔环境发生化学、电化学反应，引起腐蚀，释放出的钴、铬金属离子不仅影响材料性能，而且会对人体造成不同程度的影响，在欧美国家已有钴、铬元素致敏的报道。

Therefore,the growth characteristics of iron bacteria in the drinking water distribution system of a city were investigated.

在管网水的输配过程中，铁制管材腐蚀现象严重，造成了供水管网的二次污染，这是由于电化学反应以及微生物促进作用所致。

It all started in the 1920s, when a geologist from the University of Chicago named J Harlan Bretz concluded that the overblown topography in the Scablands was created by a sudden deluge, not the slow uniform processes of erosion and glacial scouring.

这些都开始于二十世纪二十年代，芝加哥大学一位名叫J.HarlanBretz的地质学家得出结论，疤地宏大的地形是由于突发的洪水所致，而不是徐缓而均匀的腐蚀和冰川过程。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷