Like the calcium phosphate stones, struvite stones are dirty white and radiopaque under an X-ray.

同磷酸钙结石一样，鸟粪石是灰白色的，在X线片上是不透光的。

Since they're made partly of calcium, they'll usually be radiopaque, meaning you can see them on x-ray, here's an example showing pigmented gallstones on x-ray.

因为胆红素结石部分由钙组成，故它们无法透过射线，意味着可在X光片上看到这些结石，这里是一个胆色素结石在X射线下显影的例子。

Sometimes, instead of oxalate, the calcium binds a negatively charged phosphate group to form calcium phosphate stones, which are dirty white in color and alsop radiopaque on an Xray.

有时候，钙离子与带负电荷的磷酸基团结合而非草酸，形成的磷酸钙结石呈灰白色，也在x线片上显影。

A tiny minority of stones are cystine stones, composed of the amino acid cystine which sometimes leaks into the urine to crystalize and form a yellow or light pink colored stone that is radiopaque under X-ray.

有一小部分结石是胱氨酸结石，是胱氨酸渗入尿液后结晶形成黄色或者淡粉色的结石，在X线下是不透光的。