🗣️ 情景例句
because, Danny,
因为Danny，
I can assuer you of our close cooperation.
我保证通力合作。
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。