The century plant blooms only once in its lifetime.

龙舌兰在其一生中只开一次花。

The indigo plant was highly valued until the discovery of chemical dyes in the 19th century.

在19世纪发现化学染料之前，靛蓝一直被高度重视。

Since the 19th century, the poinsettia, a native plant from Mexico, has been associated with Christmas.

自19世纪开始，一品红，一种原产于墨西哥的植物就和圣诞节联系起来。

As in the 19th century, the devastation had a thin silver lining, allowing producers to plant better clones of higher-quality grapes, but that was scant consolation.

而在19世纪，那次灾难曾拥有的仅有的一丝希望就是允许了葡萄园主种植更优质的葡萄克隆种，但那只是些许的安慰。

The direct lessons come from the Fukushima Nuclear Power Plant accident after the tsunami and the once-in-a-century great flood in North America.

它的直接背景就是日本福岛核电站海啸危难和北美洲百年一遇的大水。