其中,釉質(zhì)齲的研究資料最為豐富, 其次是牙本質(zhì), 有關(guān)牙骨質(zhì)齲的資料最少.Structural changes of dental enamel , dentine, cementum and pulpal reactions in carious process are discussed....
When his headaches developed Nick became bad-tempered and even violent.尼克出現(xiàn)頭痛時(shí)脾氣就變得很差,甚至還會(huì)動(dòng)粗。Larry began suffering severe headaches and violent mood swings.拉里開(kāi)始出現(xiàn)嚴(yán)重的頭痛和劇烈的情緒波動(dòng)。It is necessary initially to classify the he...
...the educational problems of disadvantaged children...貧困兒童的教育問(wèn)題I was disadvantaged by illness.我因病而處于不利地位.The centre aims to help disadvantaged areas of Europe, mainly by fostering new businesses.該中心旨在幫助歐洲的貧困地區(qū),方法主要是通...
頰窩毒蛇的毒牙是長(zhǎng)的空心管子.The fangs of pit vipers are long, hollow tubes.只有四分之一的蛇具有毒液和毒牙.Venom and fangs are found in only a quarter of all known snakes.在蛇的進(jìn)化史上,毒牙的出現(xiàn)是新的進(jìn)步.A more recent advance in the evolutionary story of snakes i...