男友太凶猛1v1高h,大地资源在线资源免费观看 ,人妻少妇精品视频二区,极度sm残忍bdsm变态

您現在的位置: > Language Tips > Easy English > Odd Question  
 





 
珍珠是怎樣養殖的?
[ 2006-12-22 11:39 ]

珍珠歷來受到人們的喜愛和贊賞,名貴的珍珠可以與最尊貴的寶石相提并論。光是漢語中和珍珠有關的詞匯就有很多,比如“珠圓玉潤”,“玉貌珠顏”,“珠光寶氣”等等等等。天然珍珠的產量是十分稀少的,因此人們開創了養殖珍珠的方法。下面這篇短文將為您介紹珍珠是如何養殖的。

About 4,000 years ago the Chinese discovered pearls in oysters. The inside of an oyster's shell is covered with a smooth shiny coating called mother-of-pearl. When an irritant, such as a grain of sand, gets caught inside the oyster's shell it secretes layers of mother-of-pearl to protect its body by coating the irritant. The coated grain of sand becomes a pearl.

Man can force the oyster to produce a pearl by inserting an irritant into the shell. It takes the oyster two to three years to produce a good size pearl. Cultured pearls are usually not perfect, but the Japanese have discovered that if you surgically insert an irritant directly into the body of the oyster this will produce a perfect pearl.

Historically, pearl divers dove up to 80 feet with equipment no more sophisticated than nose clips. The divers could stay under water for about a minute and they scooped up the shells with their hands and put them in tubs that would float to the surface. The largest pearl ever found is reported to be four inches around and two inches long.

oysters: 牡蠣

irritant: 刺激物

(英語點津 Annabel 編輯)

 
 
相關文章 Related Stories
 
         
 
 
 
 
 
         
 
 

48小時內最熱門

     

本頻道最新推薦

     
  Winter solstice(冬至)
  Picture time!
  電池是怎樣發電的?
  2006圣誕節特輯
  I believe I can fly!

論壇熱貼

     
  i want to have a english name
  “早生貴子”英語怎么說
  日常口語趣味翻譯(It's fun!)
  how to say "彩鈴" in English?
  “天壤之別”英語怎么說?
  翻譯:老鄉見老鄉,兩眼淚汪汪




主站蜘蛛池模板: 罗江县| 枣阳市| 五大连池市| 西峡县| 县级市| 汉寿县| 北京市| 司法| 白银市| 建水县| 沧州市| 磐安县| 虞城县| 崇义县| 汤阴县| 宁明县| 金川县| 共和县| 白沙| 丰原市| 无极县| 岫岩| 沙田区| 安西县| 汉中市| 龙山县| 铜鼓县| 大名县| 保山市| 诸城市| 木兰县| 霍城县| 双牌县| 泊头市| 获嘉县| 宜兰县| 驻马店市| 陈巴尔虎旗| 凌海市| 方城县| 本溪|