- 粗心与细心(CarelessandCareful)carefulandcarelessareasdifferentasfireandwater.butstrangely,manyscientistshaveboththesequalities,thatis,theyarebothcarefulandcareless.newton,thewellknownenglishscientist,issuchaperson.oncenewtoninvitedafriendtodinneratho...
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