英语语法分析

It is easier to enter retroperitoneum by the straight and closing method.

采用直接闭合式方法进入后腹腔，操作更简便。

These neoplasms can reach a large size in the retroperitoneum before detection.

此肿瘤在被察觉之前在后腹膜处可以生长的很大。

We report a rare case of spontaneous rupture of the biliary tree with biloma in the retroperitoneum .

我们报告一个以经皮穿刺引流治疗自发性后腹腔胆汁瘤的罕见案例。