negatives

• The repressor is essentially a negative control mechanism .
  阻遏物基本上是一种负控制机制。
• The answer is in the negative .
  回答是‘不’。
• He signified a negative .
  他做了个否定的手势。
• Positive ions drift downward, negative ions drift upward .
  正离子向下漂移，负离子向上漂移。
• It may be negative , suggesting weakness or lack of health .
  该词可含贬义，指虚弱或不健康。
• Where are the negatives now ?
  底片现在哪里？
• She could not be negative or perfunctory about anything .
  她对任何事情都不抱消极或敷衍的态度。
• Therefore, he shook his head in the most gentle negative .
  因此，他以最柔和的态度摇头表示否定。
• " lately " is used in questions and negative statements .
  “lately”用于疑问句和否定式陈述句中。
• Helping verbs may be negative contractions with -n't .
  助动词可为否定形式，但要用缩写-n't表示。