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ExtraReading 57
1. Once mammals reach adulthood, they have a very limited capacity for making new nerve cells—as they age, they lose nerve cells without replacing them.
them이 의미하는 바는?
nerve cells
2. Birds, on the other hand, can generate new nerve cells in adulthood and this means they can increase the number of nerve cells in the brain when they are needed and decrease them when they are not needed.
they 가 지칭하는 것은?
3. In Northern Hemisphere species that sing only in spring, the breeding season, the song nuclei are larger and have more nerve cells than during winter when they do not sing.
NUCLEUS의 복수
4. They shrink in size when (they are) not [needing / needed] and perhaps another area expands to take the place of the song nuclei. This time-sharing of brain capacity means a bird can keep the overall (size and weight) of its brain to a minimum.
시분할(방식) ((하나의 컴퓨터를 멀리 떨어져 있는 많은 사용자가 동시에 이용하기))
1. 조류는 다 자라면 신경세포 재생 능력이 떨어져 신경세포 수가 줄어든다. ( )
2. 조류는 필요할 때 뇌의 신경 세포의 수를 늘릴 수 있으며 필요하지 않을 때 신경 세포의 수를 줄일 수 있다. ( )
3. 북반구의 종에게 노래를 담당하는 신경핵은 노래를 부르는 번식기인 봄에 겨울 동안보다 더 작다. ( )
4. Therefore, it is hard to say that nuclear power can actually ( )f other energy sources.
그러므로 원자력이 실질적으로 다른 에너지 수단들을 대체할 수 있다고 말하기는 어렵다.
5. In fact, the bat is the only ( ) to truly fly.
사실 박쥐는 제대로 날 수 있는 유일한 포유류이다.
6. The human brain is a most unusual instrument of elegant and as yet unknown ( )
인간의 뇌는 정밀하면서도 그 능력이 아직까지 전부 알려지지 않았다는 점에서 가장 특이한 장치이다. (스튜어트 시튼, 생각명언)
7. This garment is made of a fabric that will not ( )
이 옷은 줄지 않는 원단으로 만들어졌다.
8. In breathing the chest muscles ( ) the rib cage and allow air to be sucked into the lungs.
호흡을 하면 가슴 근육이 새장 같은 갈비뼈를 확장시켜 공기가 허파 내로 흡수되게 한다.
https://www.google.com/search?tbm=bks&tbo=p&hl=ko&q=Once%20mammals%20reach%20adulthood%2C%20they%20have%20a%20very%20limited%20capacity%20for%20making%20new%20nerve%20cells%E2%80%94as%20they%20age%2C%20they%20lose%20nerve%20cells%20without%20replacing%20them.%20Birds%2C%20on%20the%20other%20hand%2C%20can%20generate%20new%20nerve%20cells%20in%20adulthood%20and%20this%20means%20they%20can%20increase%20the%20number%20of%20nerve%20cells%20in%20the%20brain%20when%20they%20are%20needed%20and%20decrease%20them%20when%20they%20are%20not%20needed.%20In%20Northern%20Hemisphere%20species%20that%20sing%20only%20in%20spring%2C%20the%20breeding%20season%2C%20the%20song%20nuclei%20are%20larger%20and%20have%20more%20nerve%20cells%20than%20during%20winter%20when%20they%20do%20not%20sing.%20They%20shrink%20in%20size%20when%20not%20needed%20and%20perhaps%20another%20area%20expands%20to%20take%20the%20place%20of%20the%20song%20nuclei.