是以

• These quantities are then dated according to the period to which they refer .
  这些量是以它们提供的周期来计算时间的。
• Special adaptations are represented by the ballistic devices of the autochors .
  特殊适应是以自播植物的弹射为代表的。
• One simple way of describing strength is in terms of surface hardness .
  描述强度的一种最简单方法是以表面硬度来表示。
• Blithedale is modeled on the transcendentalist community at brook farm .
  福谷是以“小溪农场”的超验主义者公社为蓝本的。
• It was with the sorrow so founded on satisfaction, so tending to ease .
  这种难过是以满意为基础的，是与心情舒畅相联系的。
• The central concern of economics is expressed in the concept of scarcity .
  经济学关心的中心问题是以稀缺的概念表示出来的。
• Since the world of diplomacy lives by trading information, word soon spread .
  由于外交界是以情报交易为生的，消息传得很快。
• The fading measurements were made at an original dye density of about 1. 2 .
  色牢度的测定是以原来染料密度在1.2以上为基准。
• The u.s. auctioned off some of its gold holdings at roughly four times that price .
  美国则是以四倍于此的价格拍卖其部分黄金的。
• He was practically telling us in his own way, that he knows i'm pregnant .
  他实际上是以自己的方式暗示我们：他已经知道我怀孕了。