✅ 同义词
🔴 反义词
🗣️ 情景例句
I wonder who he is.
我不知道他究竟是谁？
It's not four o'clock.
还没到四点呢。
The cave might never have been discovered has not the entrance been spotted by the distinguished French pot-holer, Berger.
若不是法国著名洞穴探险家伯杰由于偶然的机会发现了这个洞口的话，这个洞也许不会为人所知。