十七

article

48page

49page

words

• backbone
  n. 脊骨，脊柱；支柱，骨干；骨气，毅力；<美>书脊；（聚合分子的）主链；（计算机）主干网
• harshness
  n. 严肃；刺耳；粗糙的事物
• warbler
  n. 啭鸟；鸣鸟；用颤音歌唱的人
• teetere
  vi. 摇晃，摇摇欲坠；举棋不定

phrases

• fill the sack
  充满气囊
• taut up
  拉紧....
• come toward
  朝...来
• flew around
  盘旋
• learn about
  见识到

sentences

1. the line had been taut up to the very edge of the breaking point since he had hooked the fish.
   自从他钓到鱼开始，他的鱼线已经到了断裂的边缘。
2. the old man knew that only made an added drag and he was pleased.
   老人知道这只会增加拉力，所以他很高兴。
3. He was too tired even to examine the line and he teetered on it as his delicate feet gripped it fast.
   他太疲惫了以至于不能检查鱼线，他用轻巧的爪子抓住线，在上面晃着。