keel
B1 · Intermediate★★☆☆☆
Simple Meaning
船底的长条结构，帮助船在水中保持平衡。
When to Use
⚙️Technical✈️Travel English
Intermediate — can handle common situations
Examples in Conversation
“船的龙骨在撞到岩石时受损了。”
“在波涛汹涌的海面上航行，坚固的龙骨很重要。”
Learning Path
▶Full Definition
Red chalk; ruddle.