ballast
/ˈbæl.əst/
C1 · Advanced★★☆☆☆
Simple Meaning
放置在船只或车辆中用于保持稳定的重物
When to Use
⚙️Technical📚Academic Writing
Advanced — complex ideas, academic/professional
Examples in Conversation
“这艘船需要更多压舱物才能在风暴中保持平衡。”
“他们用沙袋作为热气球的压舱物。”
Learning Path
▶Full Definition
Heavy material that is placed in the hold of a ship (or in the gondola of a balloon), to provide stability.