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1·This special form of vitamin D is naturally present in breast milk.

这种特殊形式的维生素D天然存在于母乳中。《柯林斯英汉双解大词典》

2·Not all chemicals normally present in living organisms are harmless.

并非所有正常存在于活的有机体中的化学物质都是无害的。《柯林斯英汉双解大词典》

3·The doctor has arrived and is living at present in his old quarters.

医生已经到了，目前住在他原来的住处。

4·Unlike nutrients that are found only in a few foods, protein is present in all foods.

与只有少数食物中含有的那些营养物质不同，蛋白质存在于所有食物中。

5·There's a way in which the context of the war, too, shadows the poem and remains present in it.

在某种程度上，战争的背景也投影于这首诗，并一直存在于诗中。

6·Central heating was present in every upper-middle-class home by the second half of the 19th century.

到19世纪下半叶，中央供暖系统已出现在每个中上层家庭里。

7·All four of these pitfalls are present in the life of Noah, and we can learn from him how to handle these tests.

这四个陷阱都存在于诺亚的生活中，我们可以向他学习如何面对这些考验。

8·This germ—which is present in soil and water, not feces—is responsible for swimmers ear, an itchy or painful inflammation of the ear.

这种细菌——存在于泥土和水中，而非粪便——是造成“游泳耳”的主要原因，症状是耳朵发痒疼痛和红肿。

9·It isn't a school subject or an academic discipline, but it can be learned; It is a quality that is required of artists, but it is also present in the lives of scientists and entrepreneurs.

它不是一门学校的科目或学术学科，但它是可习得的；这是艺术家必须具备的品质，但它也存在于科学家和企业家的生活中。

10·Levels of pollution present in the atmosphere are increasing.

大气中的污染程度正在加深。《牛津词典》