Unknown bad habit causes tooth decay 导致蛀牙的坏习惯
本集内容 Unknown bad habit causes tooth decay 导致蛀牙的坏习惯
学习要点 有关“tooth decay 蛀牙”的词汇
边看边答 What does Rachel do that causes damage to her teeth?
acidic
酸性的
erode
腐蚀,侵蚀
你知道吗? Humans have two sets of teeth. The first set of 20, which are informally referred to as ‘milk teeth’, are lost in childhood. The adult set has 32 and consists of four incisors, two canines, four premolars and six molars in each jaw.
人类有两副牙齿。第一副20颗牙齿通常被称为“乳牙”,在孩童时代会全部脱落。成年人有32颗牙齿,其中上下额分别都有4颗门牙,2颗犬齿,4颗前臼齿和6颗臼齿。
问题答案 Rachel holds the drink in her mouth longer than the average person, which exposes her teeth to the liquid for more time.
【Unknown bad habit causes tooth decay 导致蛀牙的坏习惯】相关文章:
★ Pregnancy alters woman's brain 'for at least two years' 初次怀孕对女性大脑的影响“至少持续两年”
★ Bleed someone dry “放干某人的血”其实是“榨干钱财”的意思
★ Burn a hole in your pocket 一有钱就想花
★ Rupee withdrawal, molecules on your phone 印度撤除旧版卢比、 手机上的分子信息
★ The niche food festivals of the UK 英国多种多样的小众美食节
★ Smoking causes DNA changes in our body 吸烟会导致人体内基因变异
★ Wash your dirty linen in public 家丑外扬
最新
2019-11-15
2019-11-15
2019-11-15
2019-11-15
2019-11-15
2019-11-15