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

同磷酸钙一样，鸟粪是灰白色的，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.

因为胆红部分由钙组成，故它无法透过射线，意味X光片上看到这些，这里是一个胆色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合而非草酸，形成的磷酸钙呈灰白色，也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.

有一小部分是胱氨酸，是胱氨酸渗入尿液后晶形成黄色或者淡粉色的，X线下是不透光的。