这项调查使用的是对中西部地区2000人的随机取样。
The survey used a random sample of two thousand people across the Midwest.
许多人来信索取样品。
这是人类首次成功地无人往返取样。
不过要收取样品费和运费。
未从母亲身上采取样本。
很多细节会在取样模式中丢失。
水质取样及检测设备准备齐全。
Samples of water quality and inspection equipment are ready.
人们必须决定取样的最好部位。
通常有两种可接受的取样方法。
There are two general types of sampling that have been found acceptable.
捞砂筒也可用作业井底取样器。
你可以添加一个断言到任何取样器。
欢迎客户来电咨询，索取样品。
原则上，在取样前需要混合样品。
In principle, you need to mix the sample before you take it.
最可取得方法是从设备表面直接取样。
The most desirable is the direct method of sampling the surface of the equipment.
煤类的划分一般是取样化验。
The division of coal species is based generally on the sampling and analysis.
这在根据取样结果下结论前是很必要的。
This is necessary before any conclusions can be made based on the sample results.
加油船船员2：明白了。什么时候取样？
对厨房用冰进行取样试验。
把深水取样器固定在直升机的试验台上。
A depth sampler is strapped to the running board of the helicopter.
铁爪急速关闭以抓取样品。
警察取样指纹，鉴定尸体。
通过这些强大的流，可以对表进行取样、联结和修改。
With the powerful concept of these flows, you can sample, join, and modify tables.
从这一区域取样芯，以便检验裂纹表面。
A core was removed from this area so that the crack surfaces could be examined.
取样系统是你的分析系统中最重要的部件。
The sampling system is the most important part of your analytical system.
本采样装置包括取样器、起吊架及分样台。
The device includes a sampler, a hanger and a sample separation plate.
吊篮和平盘式取样器加大了对水流的阻力。
The basket and pan types cause an increased resistance to flow.
只能对正常的(没有怀疑的)家畜进行取样。
Only normal (not suspect), domestic animals are to be sampled.
不好的取样技术会有相反的测试结果(见下)。
A negative test may also be the result of poor sampling technique (see below).
不好的取样技术会有相反的测试结果(见下)。
A negative test may also be the result of poor sampling technique (see below).
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