Ballasts
n. （保持船身稳定的）压舱物( ballast的名词复数 ); 镇定物; 安定; 压舱材料
🗣️ 情景例句
Well, we could reschedule the operation, Mrs. Herrera,
这样吧，我们可以重新安排手术，Herrera太太。
The mining area is centered large in the north.
那里的采矿区大部分集中在北部。
My old friend, Harrison, had lived in the Mediterranean for many years before he returned to England.
我的老朋友哈里森在回到英国以前曾多年居住在地中海地区。