变

• Thundery weather often turns milk sour .
  打雷的天气常常使牛奶变酸。
• Pulmonary arteries taper towards periphery .
  肺动脉向周围逐渐变细。
• It became fragile and broke easily when handled .
  它变脆了，一拿就碎。
• The speed of light is an invariant constant .
  光速是一个不变常数。
• We assume that no interconversion takes place .
  我们假设没有互变发生。
• A feather bed enervates the body of a child .
  小孩睡羽绒床身体会变弱。
• The atmosphere changed as soon as she walked in .
  她一进来气氛就变了。
• The animal's note changed its quality .
  那个畜牲叫唤的声音变了性质了。
• Joints stiffen with advancing years .
  人一上年纪，关节就变僵硬了。
• His voice broke when he was thirteen .
  他十三岁的时候嗓音变粗了。