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汉语拼音：fú shè duì chèn

较原始而低级的生物体型。生物通过主轴可形成许多对称面。如水母等腔肠动物，是对水中固着或漂浮生活的适应。

• First, weld the butt seams on the bottom plate of the furnace, with radiating and symmetric welding conducted from the central point.

  先焊炉底板间对接焊缝，由中间往四同辐射对称焊接。

• Flowers radially symmetric, bisexual, sometimes cleistogamous.

  花辐射对称，两性，有时闭花受精。

• Flowers bisexual, mostly actinomorphic, sometimes zygomorphic.

  花两性，多数辐射对称，有时左右对称。

• Flowers bisexual, rarely unisexual, actinomorphic, perigynous or epigynous.

  花两性，很少单性，辐射对称，周位或上位。

• Flowers bisexual, 5-merous, actinomorphic or zygomorphic by the presence of a single lateral split of varying length.

  花两性，5瓣，由于一个侧面分裂的长度出现变化而成辐射对称的或左右对称。

• Flowers bisexual, actinomorphic, rarely zygomorphic.

  花两性，辐射对称，很少左右对称。

• Flowers bisexual to rarely unisexual, pinkish to white, pendent or erect, actinomorphic and hypogynous, arranged in panicles or racemes.

  花两性或很少单性，粉红色或白色，下垂或者直立，辐射对称和下位，组成圆锥花序或者总状花序。

• Flowers dense, small, actinomorphic, hermaphroditic or rarely unisexual and plants dioecious.

  花紧密，单性的小，辐射对称，两性或很少和植株雌雄异株。

• Flowers small, unisexual, actinomorphic, axillary, solitary or clustered.

  花小，单性，辐射对称，腋生，单生或丛生。