Contex-free grammar
[电] 上下文自由格式文法
🧩 词语组成解析
n. 康泰克斯（公司名）
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
She has a very strong personality.
她个性坚强。
I didn't think I'd see you here.
没想到会在这碰上你。
but where had it come from?
但它是从哪儿来的呢？