translation.en: So digital mammography has been a giant leap forward of digital mammography equipment, but it's been a very small step forward for What about ultrasound?
translation.zh: 所以数码乳房X光造影技术 对数码乳房X光造影设备的 制造商来说， 但对女性来说， 却只是一小步而已。 那么超声波呢？