很少见

Exogamy remains much less prevalent among African Americans.

异族婚姻在非洲裔美国人中仍然。

Cases of plant poisoning severe enough to warrant hospital admission are rare.

植物中毒严须住院治疗的病例。

It is rare for the responsibility for causing conflict to rest solely on one side.

只因为一方就造成冲突是的。

CSMT-induced cervicothoracic epidural hematoma, such as the one we describe here, is an extremely rare event.

CSMT引起如本病例的颈胸椎硬膜外血是的。

This sexually dimorphic lovebird species is rarely seen in aviculture and is known to be difficult to breed.

这种两种性别容易分辨的爱情鸟在鸟类饲养中的，而且难繁殖。

Conclusion PEA, a rarely seen disease,is hard to differentiate from synovioma, fibrosarcoma or giant cell tumors, whose diagnosis depends on pathological examination.

结论该病，与滑膜肉瘤、纤维肉瘤及巨细胞瘤难鉴别，确诊依靠病理检查。