In the daisy family the numerous bracts which subtend the inflorescence are known as an involucre.
在菊科植物中，苞片数目多而聚生在花序外围，称为总苞。
In addition, the bands of scattered light, which subtend a large angle with the crystal as its vertex, have been observed.
同时还观察到了具有较大张角的散射带。
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