'gradation'不是特指某个国家的语言，而是一个英语单词，可以翻译为“渐变、渐进、渐层”。这个词语常用于表达事物逐渐变化、层次逐渐升高的过程。以下是九个含有这个词语的例句：
1. The colors of the sunset are in gentle gradation from red to orange, then to yellow.
（日落的颜色由红色逐渐过渡到橙色，最后变成黄色。）
2. He achieved success through a series of graduations in his career.
（他通过一系列职业晋升获得了成功。）
3. The singer's voice was characterized by a beautiful gradation of tone.
（歌手的声音以美丽的音色层次为特点。）
4. The painting shows a gradation of light and shadow, creating a dramatic effect.
（画作展现了光影的渐变，营造出戏剧化的效果。）
5. The mountain trail had a steep gradation, making it a challenging trek.
（山路的坡度很陡，使得它成为一个具有挑战性的远足。）
6. The architect designed the building with a gradation of height, creating an interesting silhouette.
（建筑师设计了这座建筑物，高度有逐渐升高的变化，营造出有趣的轮廓。）
7. The artist used a gradation of hues to create a sense of depth in the painting.
（艺术家运用颜色的渐变来营造画面深度的感觉。）
8. The dress had a beautiful gradation of colors, blending from light pink to deep red.
（这件连衣裙的颜色过渡非常美丽，从浅粉色到深红色相融。）
9. The writer's style had a subtle gradation, building up to an emotional climax.
（作家的文笔有微妙的层次感，逐步引领到情感高潮。）
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