Underdrain
n. 阴沟, 地下沟道, 盲沟, 暗渠
🗣️ 情景例句
you spend with Dad and me ... and the family.
你和父亲， 我及全家人共度的。
Please give me your frank opinion.
请给我你坦率的意见。
Only the Earth provides ideal conditions, and even here it has taken more than four billion years for plant and animal life to evolve.
只有地球提供理想的条件，而即使在这里，植物和动物的进化也用了40亿年的时间。