氧存在于空气中。
This theory is present in Freud.
这个理论，佛洛伊德已经提出。
Lead is present in some gasoline.
有些汽油中含有铅。
Carbon is present in many minerals.
碳存在于许多矿物质里。
No ambiguity is present in the schema.
在schema中没有出现不确定的内容。
Oxygen is present in the bloodstream.
氧气存在于血管中。
An architecture is present in every system.
体系架构出现在每一个系统之中。
It is present in all cyclic views of time.
所有循环时间观（cyclic viewsof time）都含有这一维度。
You can select a system that is present in a row.
您可以选择在行中存在的系统。
In short, carbon is present in everything on Earth.
在短期内，碳是目前在地球上的一切。
This resistance is present in all connecting lines.
所有连接线上都会存在该电阻。
Iron is present in foods as haem and non-haem iron.
铁是目前作为血红素和非血红素铁的食物。
If no key is present in the cue array, no sound is played.
如果提示(cue)数组中不存在任何键，就不会播放任何声音。
Potassium is essential for life and is present in all soils.
钾是生命活动必须的，存在于各种土壤中。
A colorless gas that is present in the air in trace amounts.
空气中存在的无色微量气体。
Only one part is present in a WSDL message as shown in Listing 4.
只有一个部分显示在WSDL消息中，如清单4 所示。
When an F-code is present in a block, it takes effect immediately.
当一个F代码在一个程序段中出现时，就立即生效。
First, some form of browser or GUI is present in a Web application.
首先，在Web应用程序中有某种形式的浏览器或者GUI。
To date, the brand is present in 40 countries worldwide with stores.
目前我们的品牌专卖店遍布在全球40个国家和地区。
Result: the SQL query fetches a single row that is present in the front end.
结果：SQL查询获取到出现在前端的一个行。
The company is present in China since 2004, as well as in 15 other countries.
2004年伊狄达在中国设立分公司，并已在15个其他国家拥有分公司。
This ensures that the most up-to-date value is present in the field at all times.
这样可以确保该字段在任何时间呈现的都是最新的值。
But this argument belies the extreme variability that is present in human behavior.
但是这个理由不足以证明在人类行为中表现出的极端可变性。
After running setup, verify that the service is present in the Services applet (Figure 1).
安装过程运行之后，验证此服务出现在Servicesapplet中(见图1)。
Regurgitation is the second most common symptom, and is present in about 60% of patients.
返流是第二种最常见的症状，并有大约60％的患者存在。
The present system is in want of a total review.
目前的系统需要全面的审查。
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。
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。
A fall in interest rates is a strong probability in the present economic climate.
在目前的经济形势下，降低利率大有可能。
A fall in interest rates is a strong probability in the present economic climate.
在目前的经济形势下，降低利率大有可能。
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