1. Radiopaque materials are used in medical imaging to block X-rays and create contrast in the image.
(放射不透明材料被用于医学成像,以阻挡X射线并在图像中产生对比。)
2. The doctor ordered a radiopaque dye to be injected into the patient's bloodstream before the X-ray procedure.
(医生要求在X射线检查之前将一种放射性不透明染料注入病人的血液中。)