Parts of the body skin is visible in viewport and viewport(render) but invisible in actually render

That`s pretty odd, The parts of the skin in visible in both viewport and viewport(render), but when I click render, they are disappeared, I check the surface make sure the opacity is 1.0 and `Visible in render` is also checked. That`s really strange ,can anybody give me some advice? Many thanks.
pic1 is viewport(render) and pic2 is actual render.