be unknown

例句 (10)

• His whereabouts were quite unknown during this period.在此期间，他的下落是完全不明的。
• This drug was practically unknown in Britain.这种药物在英国是几乎不为人知的。
• Gold was totally unknown to their civilization.黄金对他们的文明来说是完全陌生的。
• These sites are largely unknown to the British public.这些遗址对英国公众来说是很大程度上不为人知的。
• The exact cause of the problem is currently unknown.问题的确切原因是目前未知的。
• Her early works were largely unknown outside her hometown.她的早期作品在她家乡以外是很大程度上不为人知的。
• Whether he will accept the offer is unknown at this point.他是否会接受这个提议，目前是未知数。
• Many species in the rainforest are still unknown to scientists.雨林中的许多物种对科学家来说是仍然未知的。
• The exact number of casualties is still unknown.伤亡人数确切数字是仍然未知的。
• The origin of the mysterious signal was unknown.神秘信号的来源是未知的。