2. This pack of gum costs fifty cents. 这包口香糖花费了五十分钱。
3. The third patient - use wire brush to brush the gum. 第三位病人患慢性齿龈病-用钢丝刷刷齿龈。
英英解释
n.
1. a preparation (usually made of sweetened chicle) for chewing
2. the tissue (covered by mucous membrane) of the jaws that surrounds the bases of the teeth
3. any of various substances (soluble in water) that exude from certain plants; they are gelatinous whe
4. cement consisting of a sticky substance that is used as an adhesive
5. wood or lumber from any of various gum trees especially the sweet gum
6. any of various trees of the genera Eucalyptus or Liquidambar or Nyssa that are sources of gum v.
1. cover, fill, fix or smear with or as if with gum
2. grind with the gums; chew without teeth and with great difficulty
3. become sticky
4. exude or form gum
