十二指肠钩虫第4期幼虫口腔的长宽几乎相等，但美洲钩虫宽大于长。
所述口腔保健用具对多种口腔疾病具有治疗与预防作用。
1·Hanako is equipped with the set of teeth made of hard plastic and lifelike mouth cavity which can bleeds and flows saliva just as human reflects against stimuli.
花子配备的硬塑料和逼真的口腔出血了，可流动的唾液和牙齿，遇到刺激能像人类一样反响。
2·Effective exaltation tooth and the immunity ability of the mouth cavity.
有效提高牙齿及口腔的免疫能力。
3·Frogs actually take their bulbous eyeballs and bring them down into their mouth cavity and use their eyeballs to shove the insect down the throat.
青蛙实际上把球根状的眼球送进口腔，并利用他们的眼球把昆虫送到喉咙里。
4·We everyday at brush teeth, but, because of our country mouth cavity health the education still is placed in the stage in entry-level, the most people dids not control to brush teeth rightly method.
请帮我翻译一下这篇文章谢谢我们每天都在刷牙，但是，由于我国口腔健康教育还处于初级阶段，大多数人并没有掌握正确的刷牙方法。