the sweatshops could learn a thing or two怎么翻译?好像是一句谚语?

the sweatshops could learn a thing or two怎么翻译?好像是一句谚语? you could travel the the profile could not be Could not start the application Violence could solve the problem? the list could go on Could not connect to the the supervisor could have prevented the accident 翻译Lingling could hardly hear the traffic.could she? the boy------(can ,could,was could)not swim last year The boy could harly speak English,(could ) he? Now the sky could be blue could be We could hardly believe the truth,_____?A could you B could we could 英语翻译Could not complete the requested operation could (someone) please turn off the tv not tom read could the book Could please pass me the book?回答