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:
★ Bye bye Big Ben's bongs 与大本钟的钟声暂时告别
★ In one ear and out the other 左耳进,右耳出
★ Mobiles at the movies 在电影院里玩手机
★ The congestion caused by ride-hailing 叫车软件造成的交通拥堵难题
★ Dessert, confectionery, sweet and patisserie 四个与“甜食”有关的单词
★ Will robots cost us our jobs? 机器人会抢走我们的饭碗吗?
★ Bleed someone dry “放干某人的血”其实是“榨干钱财”的意思
★ Sweat it out – in a bath! 泡热水澡等于做运动
最新
2019-11-15
2019-11-15
2019-11-15
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2019-11-15
2019-11-15