✅ 同义词
🗣️ 情景例句
It's on the house.
这是免费的。
He is unworthy to live who lives only for himself.
为己而生，生而可耻。
No, not exactly. But later, peole developed a way of printing, using rocks.
不完全是这样。但后来，人们利用石头，研制了一种印刷方法。