gives off

• If plastic and rubber are burnt , they 'll give off poisonous gases .
  塑料和橡胶燃烧，就会放出有毒的气体。
• They react with many metals to form a salt and give off hydrogen .
  它们能和许多金属起反应，生成盐并放出氢。
• In addition to light, there are dangerous radiations given off by the sun .
  除了光以外，太阳还发出危险的放射线。
• The folds of her scarlet silk gown gave off the enervating smell of poppies .
  她那件大红绸袍的衣褶里发出销魂蚀骨的罂粟花香。
• Jaffe found that when rubbed plants give off increased amounts of ethylene .
  贾菲发现，当搓揉植株时，植物放出的乙烯数量就增加。
• The radiator was covered with dust, and the paint was cracking; it gave off no heat .
  暖气片盖满了尘土，油漆在剥落；一丝热气也没有。
• Since free water is given off rather rapidly, barring physical interference to it release .
  只要排除物理干扰，那么游离水的释放就相当快。
• Many material, if given the proper energy, such as by heating, give off light .
  许多材料在得到适当的能量（比如在受到加热）时，都会发射出光。
• Fumes or vapor are given off from storage tanks, processing vats and other types of processing equipment .
  从贮罐、工艺加工用槽或其他类型工艺加工设备散出烟雾或蒸气。
• In fact fuels we burn and plant foods we eat give off their chemical energy in the form of heat energy .
  其实我们烧的煤和吃的植物性食物都是以热能形式放出它们所含有的化学能。