adj.秋天的，秋季的

The trees转变成 a vibrant array of autumnal hues, from fiery red to golden yellow.
树木变为一片五彩斑斓的秋色，从火红到金黄。
The crisp autumnal air invigorated her senses as she walked through the park.
当她在公园漫步时，清新的秋日空气使她的感官焕然一新。
It was an autumnal day, with leaves falling gently from the branches in a golden shower.
那是一个秋日，树叶如金色雨点般从枝头轻轻飘落。
The harvest season brought an autumnal feeling of abundance and gratitude.
收获的季节带来了丰饶和感恩的秋意。
She wore a cozy sweater, perfect for the chilly autumnal evenings.
她穿着一件舒适的毛衣，非常适合凉爽的秋夜。
The children collected leaves on their autumnal nature walk, creating a colorful collage.
孩子们在他们的秋日自然散步中收集树叶，制作了一幅五彩斑斓的拼贴画。
The scent of freshly baked apples filled the air, marking the arrival of autumnal festivities.
新鲜苹果派的香气弥漫在空气中，标志着秋季庆典的到来。
The artist captured the essence of autumnal landscapes in his oil paintings, evoking a sense of nostalgia.
这位艺术家在他的油画中捕捉到了秋天景色的灵魂，唤起人们的怀旧之情。
As the sun set, the sky took on an enchanting autumnal palette of warm oranges and deep purples.
夕阳西下，天空呈现出迷人的秋日色调，温暖的橙色与深紫交织。
The first autumnal frost greeted the morning, painting the world in a delicate layer of white.
早上的第一场秋霜给世界披上了一层精致的白霜。