It is important to study the effects of modifying elements on molybdenum products structure.
研究改性元素对钼制品性能的影响极为重要。
The modifying elements used in hypoeutectic Al Si alloys, besides Na, there are also Sr, Te, Ba, Sb, K, RE, B, S, etc.
亚共晶铝硅合金的变质元素除钠以外，还有锶、碲、钡、锑、钾、稀土、硼、硫等。其中，应用较多的是含钠和锶的变质剂。
Naturally, the worst case of accessing or modifying elements is when you do it in loops, and especially in loops over HTML collections.
当然，访问或修改元素最坏的情况是使用循环执行此操作，特别是在HTML集合中使用循环。
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