以下为句子列表：
英文: Figure 11. A, Urachal cyst. The cyst is infected and contains faintly echogenic fluid. B, Urachal cyst. The anterior wall of the tense cyst produces reverberation artifacts.
中文: 图11A，脐尿管囊肿，此囊肿已受感染，内部含有微弱回声的液体。B，脐尿管囊肿，紧绷的囊肿前壁产生反射伪影。
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英文: Figure 20. A, Enlarged inguinal lymph node. Note the echogenic hilum. B, Color Doppler scan reveals the vascular hilum of the lymph node.
中文: 图20，A，腹股沟淋巴结增大，注意淋巴结门的回声。B，彩色多普勒扫描显示淋巴结的血管门。
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英文: From 11 weeks, the brightly echogenic choroid plexuses filling the large lateral entricles are the most prominent intracranial structures.
中文: 从11周开始，表现为强回声的脉络丛充满大的侧脑室是这个时期最明显的颅内结构。
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英文: Sonography is helpful for categorizing a palpable inguinal mass. Most lymph nodes are ovoid. They typically have an echogenic central area and a hypoechoic peripheral zone (Figure 20 ).
中文: 超声对可触及的腹股沟肿块的分类非常有帮助。大多数淋巴结是卵圆形的，一般表现为中央区呈等回声和周围区呈低回声（图20）.
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