unusable的例句（unusable在句子中的用法）

• Mortality is the number or volume of trees periodically rendered unusable through natural causes. 枯损是一类由于自然原因而定期变得无用的林木株数或材积.
• Bombing had made roads and railways unusable. 轰炸导致公路和铁路都无法通行。
• To saturate with water and make soggy or unusable. 吸取过量用水浸透使湿润或不能用.
• If this situation should occur, the fram would become unusable. 如果出现这种情况, 框架就成为无用的了.
• The point of degradation, due to attenuation or distortion, at which a signal becomes unusable. 由于衰减或失真使得信号变得不能使用的那个退化点.