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

酸钙结石一样，鸟粪石是灰白色的，在X线片上是不透光的。

2.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。

3.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.

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

4.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。