Free boundary
[计] 自由边界
🧩 词语组成解析
free
[fri]
adj. 自由的;免费的;免税的;空闲的;
adv. 免费地;自由地，无拘束地;一帆风顺地;
vt. 免除;释放;使自由;解救;
🗣️ 情景例句
I thought you wanted to go to Columbia.
我还以为你只想上Columbia大学。
I leave the house at eight a.m. each day.
我每天在上午8点离开房子。
He earned enormous sums of money and was paid as much as
100 for a single appearance.