这是

• These are matrices that may be partitioned .
  这是一些能分割的矩阵。
• That's what has impoverished him, eh ?
  这是不是弄得他穷愁潦倒的原因？
• "it's a tremendous job," said tom .
  “这是一项艰巨的任务，”汤姆说。
• The rule is to avoid extreme clothes .
  衣着不要太特别，这是一条守则。
• It was an intricate and ingenious system .
  这是一个复杂而精致的体系。
• This is our purpose and our pledge .
  这是我们的目标，也是我们的誓言。
• Here is our in-house television schedule .
  这是饭店内部闭路节目表。
• "it's very distressing," said brass .
  “这是很可悲的，”布拉斯说道。
• You are envious, biddy, and grudging .
  毕蒂，你这是嫉妒，心里有气。
• It's the pearl in the oyster, anyway .
  这是蚌里的明珠，不管怎么说。