根部

• It can een descend into pockets around the base of teeth inside the gums
  牙石还会沉入牙龈中牙齿根部周围的牙袋内。
• Yes , if we can get a ligature round its neck and tie it off
  是的,如果我们能把结扎线绕住动脉瘤的根部然后把它扎死
• Refraction makes a straight stick look bent if it is partly in water
  折射使一根部分浸在水中的直棍子看起来是弯的。
• He buried the vines so the root system could continue to grow
  长到一定时候，他把一些藤埋在地下，使得根部继续生长。
• But it has no roots . .
  然而它却没有根部. .
• He removed the shelter once the root system began to push against it
  当根部系统开始向大棚外部生长时，他就把大棚移走。
• Ammonium is toxic and is converted to organic nitrogen compounds in the root
  铵有毒，在植物根部被转化为有机含氮化合物。
• But it has no roots
  然而它却没有根部
• The ca levels had a great influence on p concentration in the root and petiole
  钙对蜈蚣草根部及叶柄中磷浓度有显著影响。
• M : it s difficult if we water the plant from the leaves and not the root
  答：这很难，如果我们都朝叶子浇而不是由根部浇水。