Underset
n. 下层流, 下层矿脉
✅ 同义词
🗣️ 情景例句
Simply this.
简单说来是这样的。
Please sign a copy of our Sales Contract No.156 enclosed here in duplicate and return to us for our file.
请会签第156号销售合同一式两份中的一份，将它寄回我方存档。
As the parents had five children, life was a perpetual struggle against poverty.
家里已有5个孩子，全家人常年在贫困中挣扎。