#頭條創作挑戰賽##每天打卡背單詞#D154[奮鬥]
1、solemn adj. 嚴肅的，莊嚴的，隆重的
His father is a solemn man and rarely smiles.
2、behavioral adj. 行為的
These two children have different behavioral responses to the same news.
3、dropout n. 辍學生
He left school as a dropout because he had to help his family with farming.
4、infrastructure n. 基礎設施
A good infrastructure includes transport, communications, etc.
5、cultivate v. 耕作，種植，栽培
The farmer is using a machine to cultivate the land.
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