Ballasting
n. 压舱材料, 道碴材料
🗣️ 情景例句
It was so kind of them.
他们太客气了。
Try to be there by 8:15 the airport will be crowded.
尽量在8点15分以前赶到那里，到时机场会很拥挤的。
I do not care whether it rains or not.
我不管天会不会下雨。