Ultrasound screening的用法和样例：
例句
- Prenatal ultrasound screening is one of the effective means of intervention for birth defects control.
产前超声筛查是干预胎儿出生缺陷的有效手段之一。 - These represent the fundamental knowledge that anyone who will be or is doing obstetric ultrasound scanning should be expected to know.
这些大纲是任何将要或正在从事产科超声筛查的医生所应该了解的。
