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Fill a clean, dry and accurately weighed pycnometer with the substance being examined (keep the temperature below 20°C or that specified under individual monograph), fix the thermometer (no air bubble is left in the pycnometer). Place the pycnometer in a water bath maintained at 20°C or the specified temperature, allow to stand in the water bath for several minutes, so as to raise the temperature of the content to 20°C or to the temperature specified in the monograph.

取洁净、干燥并精密称定重量的比重瓶，装满供试品（温度应低于20°C或各品种项下规定的温度）后，装上温度计，置20°C（或各品种项下规定的温度）的水浴中放置若干分钟，使内容物的温度达到20°C（或各品种项下规定的温度），用滤纸除去溢出侧管的液体立即盖上罩。

It can keep track of the best and average hang time as well as the total accumulated time in the air.

它可以记录的最佳和平均坑的时间，以及总累积时间，在空气中。

The Commission recommends that these data be tabulated and combined with existing data in a national IFAP data clearinghouse that will enable agencies to keep track of air, water, and land emissions from IFAP facilities and evaluate the public health implications of these emissions.

委员会认为，这些搜集而来的资料应立即建档，并与全国工业畜产的资讯交流中心整合，以利於当局持续追踪工业农场设施的废弃物排放，并就此评估对公共卫生的冲击。

I try to keep that temperature between 230-240F by adjusting the air intake vent at the bottom of the smoker.

我试着保持温度之间的230 240f通过调整进气发泄在底部的吸烟者。

A large range of IRZ and intense fluctuating velocity area around the boundary of IRZ is measured and thought to be important to keep the excellent ignition and combustion characters of the new kind swirl burner. Together with temperature trace method, different structure and operation parameter of the burner are studied in this paper about their effects on turbulent and mixing characters of swirling jet. The structure variation includes different blade angle, use of central gear shape baffle, variable outer length and angle of lean primary air outlet, use of wedge outlet of lean primary air.

采用上述两种测量方法并结合热质比拟温度示踪的方法，本文对径向浓淡旋流煤粉燃烧器喷口结构和气流流动参数的变化对旋流流场的流动、混合、湍流脉动特性的影响进行了深入研究，研究了旋流叶片倾角大小、中心齿型扩锥、淡一次风扩口外伸长度和扩角的变化、淡一次风楔形扩口、直流二次风扩口角度的变化对出口旋转射流流动特性的影响，研究了一次风率和旋流二次风率运行参数变化的影响规律。

It is capable of air-breathing, thanks to an auxiliary respiratory organ, and can withstand very poor water conditions, making it an easy fish to keep in the aquarium.

它有空气呼吸的能力，因为有能辅助呼吸的器官，并能承受恶劣水环境，使它成为一个容易生活在在水族馆的鱼。

Right you are, but you should keep it in an air-conditioned room .

行，但你要把它放在空调房里。

Right you be, but you shall keep it in an air-conditioned room .

行，但你要把它放在空调房里。

While we were waiting to land, the air-hostess told us to keep calm.

当我们等待着陆的时候，一位飞机乘务员叫我们保持镇静。

An air-hostess told us to keep calm and to get off the plane quietly as soon as it had touched down.

一位女乘务员叫我们保持镇静，等飞机一着陆，就立刻平静地离开飞机。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。