单词：round foramen
圆孔
round foramen的用法和样例：
例句
- At the right is a probe patent foramen ovale in an adult.右为成年人卵圆孔未闭的探查。
- European peasants would insert a wooden drill in a round hole and rotate it briskly between their palms.欧洲的农夫将一个木钻子放入一个圆孔并用手掌不停旋转它。