The end of the nineteenth century and the early years of the twentieth century were marked by the development of an international Art Nouveau style，characterized by sinuous lines，floral and vegetable motifs，and soft evanescent coloration.
(特殊结构marked by…——以…为标志、characterized by…——特征是)
19世纪末与20世纪早期以一种国际新艺术风格的发展为标志，这一艺术风格的
特征是：线条弯曲、以花卉和果蔬为主题，颜色柔和飘逸。
分句1：The end of the nineteenth century and the early years of the twentieth century were
分句2：marked by the development of an international Art Nouveau style
分句3：characterized by sinuous lines，floral and vegetable motifs，and soft evanescent coloration.
2和3并列
1和2、3嵌套
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