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sec.on.da.ry COMING AFTERH5sek7[n7dri, $-der7iadj [not gradable]developing from something similar that existed earlier继发的，间接的The drug is not very effective against AIDS, though it may be used to treat secondary viral infections.这药对艾滋病不是很有效，虽然它可以用来治疗继发的病毒感染。You can't just rely on secondary sources.你不能仅仅依赖间接证据。A deep voice and facial hair are secondary sexual characteristics.低沉的声音和胡须是第二性征。
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