a piece of

• He broke a piece of bread from the loaf .
  他从长条面包中掰下一小块。
• Put the finishing touches to a piece of work .
  给一个作品作最后加工。
• Press out shapes from a piece of card .
  从一张纸板上压出各种花样。
• You have an option on a piece of land .
  你有买卖一块地皮的选择权。
• Imagine a piece of music which expresses love .
  设想一段表现爱情的音乐。
• This vase is a piece of exquisite workmanship .
  这花瓶工艺很精。
• I make bold to give you a piece of advice .
  我不揣冒昧，贡献您一点意见。
• Give me a piece of rope ; any length will do ...
  给我一根绳子，多长都行。
• She let a piece of lace into a dress .
  她在衣服上镶入一块花边。
• He bound the box with a piece of string .
  他用绳子把箱子捆好。