"euxenite:a lustrous, blackish-brown rare-earth mineral consisting primarily of cerium , erbium, titanium, uranium, and yttrium."
"黑:种光亮的棕黑色土石,主要由铈、、、和钇构成."
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Many visual beauty standards vary between cultures and eras, and signs of youth, fertility and good health, such as long lustrous hair, or smooth, scar-free skin, are almost always in demand because they're associated with reproductive fitness.
不同的文化和时代,对视觉美的标准都有所不同而作为年轻、活力、健康的标志,比如富有光泽的长发或者光滑无疤的皮肤永远很受欢迎,因为它们也代表着良好的繁殖能力。