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。
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。
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。
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。
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。
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。
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。
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。
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。
Levels of pollution present in the atmosphere are increasing.
大气中的污染程度正在加深。
Analysis showed that traces of arsenic were present in the body.
分析显示，尸体中有微量砒霜。
Alcoholism is clearly present in society today.
酗酒在当今社会是非常常见的。
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，中上层阶级家庭都用上了中央供暖。
The specific glycosides present in milkweed differ from region to region within the monarch butterfly's range.
马利筋中的特殊糖苷在帝王蝶的范围内因地区而异。
The roots of melon plants perform less efficiently under the low-oxygen conditions present in rainsoaked soil.
在雨水浸泡的土壤中，低氧条件下的瓜类植物的根部效率很低。
No air bubbles were present in the green ice, suggesting that the ice was not formed from the compression of snow but instead from the freezing of seawater.
绿色冰层中不含气泡，这表明了这种冰层是由冻结的海水形成的，而不是凝结压紧的积雪。
The meeting has made Obama the first US president to be present in the same room as a Burmese leader since Lyndon Johnson met Prime Minister Ne Win in 1966.
本次会议使奥巴马成为继林登·约翰逊与总理奈温在1966年会面后首位与缅甸领导人同处一室的美国总统。
Such ice cores trap gases, bits of dust, and other chemicals that were present in the snow that fell over Greenland for thousands of years and then became compressed into ice.
这些冰芯将气体、尘埃和其他化学物质封存在格陵兰岛数千年来的积雪中，然后被压缩成冰。
In view of this behavior it has been suggested that chemicals present in fresh buck rubs may help physiologically induce and synchronize fertility in females that visit these rubs.
这种行为表明新鲜擦痕上的化学物质可能有助于从生理上诱导并让关注这些擦痕的雌鹿同时受孕。
Ferulic acid (FA) and p-coumaric acids are phenolic antioxidants present in a variety of plants.
阿魏酸（FA）和对香豆酸是存在于多种植物中的酚类抗氧化剂。
Figure 6 shows a ship operation with an order type parameter that is not present in the ship order operation.
图6显示了具有订单类型参数的船舶操作，该参数在船舶订单操作中不存在。
目前他正在上海。
Aerobic sporeformers were found present in all the samples.
所有样品中都发现有需氧芽孢菌。
There was no microbody in the generative cell but many microbodies were present in the tube cell cytoplasm.
生殖细胞内不具微体，而管细胞的细胞质有较多的微体。
And they are now present in the Arab world.
这种困境现在出现在阿拉伯世界之中。
I sent him a present in return for his help.
我送给他一份礼物以回报他的帮助。
Relationships are always present in communities.
关系在社区中是永远存在的。
Several were present in 1997-but also in 1992.
有的1997年出现过——但1992年也出现过。
You can select a system that is present in a row.
您可以选择在行中存在的系统。
He wrapped the present in pretty paper for his girlfriend.
他用精美的纸给女朋友包好礼物。
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