弹性蛋白碎片浓度的英文：
EFC, elastin fragment concentration

Collagen and elastin provide the strength and resiliency of connective tissues such as skin and ligaments
胶原和弹性蛋白使象皮肤和韧带这样的结缔组织具有韧性和弹性。

A snatch;a fragment.
片段；部分

After the election the coalition fragmented.
选举之后，联盟瓦解了。

There's a fragment of glass in the wound.
伤口内有玻璃碎片。