d라이브러리
"today"(으)로 총 44건 검색되었습니다.
- 책의 혁명과학동아 l198712
- though both inks and writing surfaces have been improved. In earlier times, scribes wrote on parchment or tree bark. Today, paper is available more cheaply than papyrus ever was and is in more ...
- 가장 중요한 화석과학동아 l198711
- lizardlike.From all this, why not deduce that the animal is an extremely ancient reptile, ancestral to the lizards of today?That might have been the case, were it not for one all-important diff ...
- 연료만들기과학동아 l198710
- There will always remoin a demand for something simple,like the burning of fuel, and scientists are striving even today to find better, more convenient fuels, and, most important of all, fuels ...
- 가장 큰 날짐승과학동아 l198709
- energy to beat wings against the air in such a way as to rise upward and remain supported on that thin medium. Today, the only flying species that, like reptiles, are cold-blooded, are the inse ...
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