英语语法分析

What advantage melanism brings in these circumstances is obscure.

在这些环境中表皮黑化到底有什么优势似乎模糊不清。

Sixty percent of the tumors were accompanied with calcification, 35% with ossification, 25.5% with hemosiderin or melanism.

病例伴有钙化，35％有骨化，25.5％有含铁血黄素或黑色素沉着。

Insect melanism is one of the common polymorphism in nature, and has become classical study system for species evolution and adaptability.

昆虫黑化是自然界中普遍存在的一种多型现象，也成为揭示物种在自然界中进化与适应的经典范例。