实际上，培育百日菊属植物开花对空间站宇航员ScottKelly来说极富挑战。
Indeed, getting the zinnia flowers to bloom proved challenging for ISS astronaut Scott Kelly.
百日菊原产美洲热带地区的一种百日菊属植物，尤其是菊科，因其有各种颜色的、艳丽的舌。
Any of various plants of the genus Zinnia, native to tropical America, especially Z. elegans, widely cultivated for its showy, rayed, variously colored flower heads.
百日菊原产美洲热带地区的一种百日菊属植物，尤其是菊科，因其有各种颜色的、艳丽的舌。
Any of various plants of the genus Zinnia, native to tropical America, especially Z. elegans, widely cultivated for its showy, rayed, variously colored flower heads.
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