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"useful"(으)로 총 36건 검색되었습니다.- 인류최초의 발견─불의 사용과학동아 198903
- to appear in more recent layers. Once Fire came to be used, in other words, it continued to be used. It was too useful to be allowed to sink back into oblivion.Dwelling in those ancient caves w ...
- 다이아몬드 개량과학동아 198809
- sparkling, rare and expensive. Yet we seem to be on the threshold of making diamonds common, cheap and very, very useful.Diamond is pure carbon and carbon is one of the cheapest substances the ...
- 최고(最古)의 날짐승과학동아 198808
- a predator trying to make a meal of it.It might well turn out that this ability to jump longer and farther was so useful that any random change that improved the ability would increase the chan ...
- 나무 달력과학동아 198801
- in the Southwest have been dated accurately. Of course, long-lived trees are rare, but even short-lived trees can be useful if, for some reason, their dead wood did not rot too quickly. Oaks, f ...
- 책의 혁명과학동아 198712
- form. Other types of writing on hand surfaces(a sharp instrument on a waxed tablet, chalk on a piece of slate) may be useful, but don't have the permanence of books. Carvings on stone columns a ...
- 가장 중요한 화석과학동아 198711
- be useful.The answer evolutionists make is that even if they only helpled the bird glide, that in itself would be useful, and that the situation would slowly improve until full flight wa ...
