动词
中文翻译：增长
同义词：
['extension', 'elongation']
例句：
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1.The lengthening shadows of the trees cast a cool shade on the lawn.
树木的影子逐渐拉长，给草坪投下了凉爽的阴影。
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2. The lengthening days of summer are perfect for outdoor activities.
夏季日渐增长的日子非常适合户外活动。
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3. The lengthening season is when the crops begin to grow.
生长季节是农作物开始生长的时候。