These youngsters had low supplies of heavy elements-for example, their oxygen content was only 20 percent of the sun's.

这些年轻的恒星提供的重元素很少——例如，它们的含氧量仅为太阳的20%。

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Comparison with EAF dust at carbon and low alloy steel works, the EAF dust at stainless steel works contains more alloy elements but zinc content is lower.

与普碳钢或低合金钢厂电弧炉烟尘比较，不锈钢电弧炉烟尘含有更多的合金元素，但锌含量较低。

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The low content of alloying elements (Mo, V) and tempering insufficiency of parts also affect the generation of the crack. Preventive measures are proposed to decrease or eliminate the crack.

合金元素钼、钒含量偏低，工件热处理回火不充分也会影响到裂纹的产生，并提出了相应的预防措施。

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