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¨ç ºø¹°ÀÇ »ê¼ºµµ(pH)°¡ 5.6 ÀÌÇÏ·Î ³·¾ÆÁö¸é »ê¼ººñ°¡ µÈ´Ù. ¼­¿ï ÀϺΠÁö¿ª¿¡´Â ¶§¶§·Î ȯ°æ ±âÁØÄ¡¸¦ ÃÖ°í 100¹è±îÁö ÃÊ°úÇÏ´Â °­ÇÑ »ê¼ººñ°¡ ³»¸°´Ù. ¿ì¸®¿¡°Ô ¸¹Àº ÇÇÇظ¦ ÁÖ´Â »ê¼ººñ´Â ´ë±â ȯ°æÀÌ Àü¹ÝÀûÀ¸·Î ¾ÇÈ­µÇ¾úÀ½À» ÀǹÌÇÏ´Â °ÍÀ̹ǷÎ, ¿ì¸®´Â ´ë±â ȯ°æ¿¡ ´õ ¸¹Àº °ü½ÉÀ» ±â¿ï¿©¾ß ÇÑ´Ù.
¨è ¹Ì±¹ÀÇ 'ÇØ¾ç ´ë±âû'Àº 1999³â 8¿ù 15ÀÏ ³²±Ø ´ë·ú¿¡¼­ °Å´ëÇÑ ºù»êÀÌ ºÐ¸®µÇ¾ú´Ù°í ¹ßÇ¥ÇÏ¿´´Ù. 'A-38'·Î À̸§ÀÌ ºÙÀº ÀÌ ºù»êÀº Á¦ÁÖµµ ¸éÀûÀÇ 4¹è Á¤µµÀÇ Å©±âÀÌ´Ù. ÀΰøÀ§¼º ÀÚ·á ºÐ¼®À¸·Î ¹àÇôÁø ÀÌ ºù»êÀÇ ºÐ¸® Çö»óÀº Áö±¸ ¿Â³­È­ÀÇ ÁøÇà Á¤µµ¸¦ ¾Ë·ÁÁÖ´Â ÇϳªÀÇ ÁöÇ¥°¡ µÈ´Ù.
¨é ¼¼»óÀÌ ÀÌ·¸°Ô ½Ã²ô·¯¿îµ¥ ´«¿¡ º¸ÀÌÁöµµ ¾Ê´Â ¼ºÃþ±Ç¿¡¼­ ÀϾ´Â ÀÏ¿¡±îÁö °ü½ÉÀ» °¡Áú ÇÊ¿ä°¡ ÀÖ´À³Ä°í ¹¯´Â »ç¶÷ÀÌ ÀÖÀ»Áöµµ ¸ð¸£°Ú´Ù. ±×·¯³ª ¼ºÃþ±Ç³»ÀÇ ÇØ¹ß °íµµ 20 30km ºÎ±Ù¿¡¼­ ÁøÇàµÇ´Â ¿ÀÁ¸Ãþ Æı« Çö»óÀÌ ¾ðÁ¨°¡´Â ÀηùÀÇ ¸ê¸ÁÀ» °¡Á®¿ÃÁöµµ ¸ð¸¥´Ù´Â ¿ì·Á°¡ °íÁ¶µÇ°í ÀÖ´Ù.


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¨ê The use of iron in shipbuilding had small beginnings, like everything else. The established prejudice that iron must necessarily sink in water long continued to prevail against its employment. The first iron vessel was built and launched by John Wilkinson in Staffordshire. In a letter of his, dated the 14th July, 1787, he writes: "Yesterday week my iron boat was launched. It answers all my expectations and has convinced the unbelievers, who were 999 in 1000. It will be only a nine days' wonder, and afterwards a Columbus's egg." It was, however, more than a nine days' wonder; for wood long continued to be thought the only material capable of floating.
prejudice Æí°ß prevail ¾ÐµµÇÏ´Ù employment »ç¿ë
vessel ship launch ¹è¸¦ ¶ç¿ì´Ù yesterday week recent week
a nine days' wonder °ð ÀØÇôÁö´Â »ç°Ç

¨ë Smith made many models of boats, his experiments extending over many years. In 1834, he constructed a boat propelled by a wooden screw driven by a spring, the performance of which was thought extraordinary. Where he had got his original idea is not known. It was floating about in many minds and was no special secret. Smith, however, arrived at the conclusion that his method of propelling steam vessels by means of a screw was much superior to paddles at that time exclusively employed. In the following year, 1835, he constructed a superior model, with which he performed a number of experiments at Hendon. It was not the production of one man, but of several generations of mechanical inventors. A perfected invention does not burst forth from the brain like a poetic thought or a fine resolve.
screw ¹èÀÇ ½ºÅ©·ç½Ä ÃßÁø±â propel ÃßÁøÇÏ´Ù
paddle ¹èÀÇ ¹°·¹¹æ¾Æ½Ä ÃßÁø±â burst forth °©Àڱ⠳ªÅ¸³ª´Ù

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2. ¹®Á¦
Á¦½Ã¹®À» Àаí, À¯ÀÇ»çÇ×À» ÂüÁ¶ÇÏ¿© ¹°À½¿¡ ´äÇϽÿÀ.

¡¼¹®Á¦£±¡½ <Á¦½Ã¹® °¡>ÀÇ ¨ç, ¨è, ¨éÀº »ê¾÷È­°¡ ÁøÇàµÇ¸é¼­ ¹ß»ýÇÑ È¯°æ¾ÇÈ­ Çö»óÀ» ¼³¸íÇÑ ±ÛÀÌ´Ù. ÀÌ Çö»óµéÀÌ ¹ß»ýÇÏ´Â ¿øÀÎÀ» Ç׸ñº°·Î ±â¼úÇϽÿÀ. (200 300ÀÚ)

¡¼¹®Á¦£²¡½ <Á¦½Ã¹® ³ª>ÀÇ ¨ê¿Í ¨ë¿¡ ±Ù°ÅÇÏ¿©, ÀªÅ²½¼(Wilkinson)°ú ½º¹Ì½º(Smith)°¡ º¸¿©ÁØ °úÇÐÀû ¹ß¸í°úÁ¤ÀÇ °øÅëÁ¡°ú Â÷ÀÌÁ¡À» ¼³¸íÇϽÿÀ. (200 300ÀÚ)

¡¼¹®Á¦£³¡½°úÇбâ¼úÀº Àηù ¹®¸íÀÇ ¹ßÀü¿¡ ±â¿©Çϱ⵵ ÇÏÁö¸¸, Áö±¸È¯°æ ¾ÇÈ­¶ó´Â ºÎÀÛ¿ëµµ ÃÊ·¡ÇÑ´Ù. ÀÌ·± ºÎÀÛ¿ëÀ» ±Øº¹ÇÏ·Á¸é, <Á¦½Ã¹® ³ª>ó·³ ±âÁ¸ °úÇбâ¼úÀÇ ÇѰ踦 ¶Ù¾î³Ñ´Â ³ë·ÂÀÌ ÇÊ¿äÇÏ´Ù. ÀÌ¿Í °°Àº °üÁ¡¿¡¼­ <Á¦½Ã¹® ´Ù>¸¦ Âü°íÇÏ¿© <Á¦½Ã¹® °¡>ÀÇ Çö»ó¿¡ ´ëÇÑ ÇØ°á ¹æ¾ÈÀ» Á¦½ÃÇϽÿÀ. (500ÀÚ ¾ÈÆÆ)


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