名词
中文翻译：落线
同义词：
['fallingline', 'descending line']
例句：
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1. The falling line of the suncasts long shadows across the field.
太阳的落线在田野上投下长长的影子。
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2. The falling line of the riveris marked by a series of small islands.
河流的落线由一系列小岛标出。
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3. The falling line of the roadis visible from the car window.
道路的落线从汽车窗户可见。