欧路词典
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n. 氧混98%2%氧,供潜水员在深水中维持呼吸用)

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hydrocylinder, hydrocyst, hydrocystoma, hydrodealkylation, hydrodecyclization, hydro-dehazer, hydrodemetalization, hydrodenitrogenation, hydroderivating, hydroderma,

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heliotropism, Heliotropium, heliotype, heliotypography, heliotypy, heliox, heliozincograph, heliozincography, Heliozoa, heliozoan,