Ballasting
n. 压舱材料, 道碴材料
🗣️ 情景例句
Where are the toys hidden away?
那些玩具藏在什么地方？
Where am I supposed to pay the excess train fare?
我应该在哪里补票？
Quite right, sir, quite right.
您说得很对，先生，您说得很对。