Underboarding
垫板, 衬板
🗣️ 情景例句
After my wife died,
我妻子去世后，
Adversity is a good discipline.
苦难是磨练人的好机会。
These satellites go round the earth and help us to learn more about the earth, the weather and other things.
这些卫星绕着地球转，帮助我们更好地了解地球、天气和其他情况。