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�깮臾쇳븰�쟻 �떆怨�
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If you have ever flown across several time zones, you have experienced jet lag. You arrived in a new time zone, but your body was still living on the time in the old zone. You were wide awake and ready for dinner in the middle of the night, and you wanted to sleep all day.
�떦�떊�씠 紐뉖챺 �떆媛꾨��瑜� 媛�濡쒖쭏�윭 鍮꾪뻾�쓣 �빐遊ㅻ떎硫�, �떦�떊��� �떆李⑤�� 寃쏀뿕�뻽�뒿�땲�떎. �떦�떊��� �깉濡쒖슫 �떆媛꾨���뿉 �룄李⑺뻽�뒿�땲�떎, 洹몃윭�굹 �떦�떊 紐몄�� �삤�옒�맂 吏��뿭�뿉 �엳�뒗 �떆媛꾩뿉 �뿬�쟾�엳 �궡怨� �엳�뒿�땲�떎. �떦�떊��� ����뀅�떇�궗 媛� �셿�쟾�엳 �옞�씠 源� �븳諛ㅼ쨷�뿉 以�鍮꾨릺�뼱 �엳怨�, 醫낆씪 �옄怨� �떢�뒿�땲�떎.
People suffer from jet lag because all living things have a biological clock. Plants and animals are all rhythm with the natural divisions of time-day and night and the seasons.
?紐⑤뱺 �깮臾쇰뱾��� �깮臾쇳븰�쟻 �떆怨꾨�� 媛�吏�怨� �엳湲� �븣臾몄뿉 �궗�엺�뱾��� �떆李⑥뿉 �쓽�븳 �뵾濡쒕줈 怨좏넻 諛쏅뒗�떎. �떇臾쇨낵 �룞臾쇰뱾��� �궙怨� 諛� 洹몃━怨� 怨꾩젅�뿉 �쓽�븳 �옄�뿰�쟻 遺꾨쪟��� 由щ벉�씠 �엳�떎.
At sunrise, plants open their leaves and begin producing food. At night, they rest. In the temperate zones of the earth, trees lose their leaves in fall as the days grow shorter and there is less sunlight. In the spring, leaves and fl���(�깮�왂)
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e birds migrate to a region with a warmer climate. Their biological clocks tell them it is time to do all of these things.
�룞����뀡�뿉 ���遺�遺꾩쓽 �깉�뱾��� 源⑥뼱�굹 �끂�옒�븳�떎. �빐媛� 吏� �뮘 洹몃뱾��� �옞�뱺�떎. 遊꾩씠 �삤硫� �깉�뱾��� �룞猷뚮�� 李얘린 �떆�옉�븳�떎. 寃⑥슱�씠 �삤硫� 紐뉖챺�쓽 �깉�뱾��� �삩��� 湲고썑 吏��뿭�쑝濡� �씠二쇳븳�떎. 洹몃뱾�쓽 �깮臾쇳븰�쟻 �떆怨꾨뒗 �씠 �씪�뱾�쓣 紐⑤몢 �빐�빞�븯�뒗 �떆媛꾩엫�쓣 留먰빐以��떎.
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Animals that live near the sea and depend on both the land and the water for their food have their biological clocks set with the tides. When the tide goes out, they know it is time to search for the food that the sea left behind it.
諛붾떎 媛�源뚯씠�뿉 �궡怨� 癒뱀씠瑜� �븙怨� 洹쇳빐 紐⑤몢�뿉 �쓽議댄븯�뒗 �룞臾쇰뱾��� 議곗닔�뿉 留욎떠吏� �깮臾쇳븰�쟻 �떆怨꾨�� 媛�吏�怨� �엳�떎. 諛붾떣臾쇱씠 諛��젮媛� �븣(�뜲臾쇱씪 �븣) 洹몃뱾��� 洹� �뮘�뿉 癒뱀씠瑜� �쐞�빐 諛붾떎瑜� 李얠쓣 �떆媛꾩엫�쓣 �븣怨� �엳�떎.
Some insects seem to set their alarm clocks to wake them up at night. They are out all night looking for food and ten sleep during the day. Honeybees have a very strong sense of time. They can tell by the position of the sun exactly when their favorite flowers open.
紐뉖챺�쓽 怨ㅼ땐�뱾��� 諛ㅼ뿉 洹몃뱾�쓣 源⑥슦湲� �쐞�븯�뿬 洹몃뱾留뚯쓽 �옄紐낆쥌�쓣 留욎텛�뒗 寃껋쑝濡� 蹂댁씤�떎. 洹몃뱾��� 諛� �궡�궡 癒뱀씠瑜� 李얘린 �쐞�빐 �굹媛�怨� �궙 �룞�븞�뿉�뒗 �옞�쓣 �옍�떎. 踰뚭���뱾��� �떆媛� 媛먭컖�씠 留ㅼ슦 媛뺥븯�떎. 洹몃뱾�쓽 留덉쓬�뿉 �뱶�뒗 苑껋씠 �뼵�젣
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