中国人修筑城墙的历史久远，可以追溯到战国时期。历史上，中国共修过大约20座长城。在所有这些长城中，明长城最长，达到6700公里。在当时，中国技术在世界上处于领先地位，因此明长城的结构也是最复杂的。明长城的修筑是为了抵御北方游牧民族的入侵。

Events of buidling walls could be dated ~~back to ~~the Zhan Era. In history, China has built twenty walls, the longest of which is~~ the Great Walls of Ming Dynasty, reaching 6,700 kilometers. Since China took prominence~~ in technique around the world, the structure of the wall is the most complex. The purpose of the buildng is to prevent invasion from northern ethnicities.

The Chinese started to build city walls as back as during the Warring States Period. Of roughly 20 walls that were built in China, the Ming Great Wall, referring collectively to walls erected during the Ming Dynasty is the longest, extending/stretching 6,700 km. As China led the world in technology back then, the Ming Great Wall was structurally the most sophisticated. The Ming walls were built to ward off/fend off nomadic invasion/inroads from the north.

城墙 (city) wall
战国时期 the Period of Warring States/Warring States
明长城 Ming Great Wall
处于领先地位 to be in the lead; to take the lead; to get ahead
游牧民族 nomadic people; the nomads; the hordes
修（长城） erect/build

得而达是全美首家成功获得ISO9001质量管理体系和ISO14001环境管理体系认证的水龙头公司，年销售额超10亿美元。迄今为止，在全球已经安装了超过2亿个得而达水龙头，是美国水龙头市场品牌知名度和购买率最高的品牌。能够从设计、外观等每个角度满足消费者。

Delta is the first American water top company recognized by~~ the quality management system of ISO9001 and ~~environment management system of ISO14001. The annual revenue surpasses 1 billion dollars. Until now, more than 0.2 billion water tops around the world are produced by Delta. The top American brand of water brand, which gains largest popularity and sales, can satisfy customers in design, form, and any other aspect.

Delta represents the first American faucet maker to have been certified with ISO 9001 and ISO 14001. As the best known faucet brand that outsells any other rival in America, Delta boasts annual sales of over US $1 billion, supplying over 200 million Delta faucets globally so far. Delta caters to consumers with smart interior designs and sleek enterior designs.

水龙头公司 faucet maker
水龙头 stopcock; hydrovalve; swivel （钻探）; fuller faucet; fuller bibcock; fuller cock; water tap; faucet
获得（质量管理体系/环境管理体系）认证 certified with…
年销售额超… boast annual sales of over…
在全球已经安装了多少（某某品牌）的… … supplys …. globally so far
购买率最高 brand that outsells any other rival
夸商品设计、外观：smart/sleek