grab sample

简明释义

手工取样

英英释义

例句

1.The technician took a grab sample to analyze the water quality.

技术员取了一份抓取样本来分析水质。

2.The environmental scientist recommended taking a grab sample of the air during the study.

环境科学家建议在研究期间取一份抓取样本的空气。

3.To assess contamination levels, we performed a grab sample of the surface water.

为了评估污染水平，我们对表层水进行了抓取样本的采集。

4.A grab sample was taken from the production line to ensure product safety.

从生产线上取了一份抓取样本以确保产品安全。

5.During the inspection, we collected a grab sample of the soil for testing.

在检查期间，我们收集了一份抓取样本的土壤进行测试。

作文

In environmental science and engineering, the term grab sample refers to a method of collecting a sample of a substance at a specific moment in time. This technique is often used to assess the quality of water, air, or soil. Unlike composite sampling, where multiple samples are taken over a period and then combined, a grab sample captures a single snapshot of the environment. The significance of this method lies in its ability to provide immediate insights into the current state of a particular medium. For instance, when testing water quality in a river, a researcher may decide to take a grab sample during a storm event, as this could reveal pollutants that are washed into the waterway. One of the advantages of using a grab sample is its simplicity and speed. It allows researchers to quickly collect data without extensive preparation or equipment. However, it is important to note that while grab samples can provide valuable information, they may not represent the overall conditions accurately. This limitation arises because environmental conditions can change rapidly. For example, if a researcher takes a grab sample from a lake on a sunny day, the results may differ significantly from those obtained on a rainy day when runoff might introduce contaminants. In many cases, a grab sample is used in conjunction with other sampling methods to provide a more comprehensive understanding of environmental conditions. By analyzing both grab samples and composite samples, scientists can better interpret the data and draw more reliable conclusions. Moreover, regulatory agencies often require grab samples for compliance monitoring, ensuring that industries adhere to environmental standards. The process of collecting a grab sample involves several steps. First, the researcher must identify the location and timing for sampling, considering factors such as weather, time of day, and potential sources of contamination. Next, appropriate containers must be selected to prevent contamination and preserve the integrity of the sample. Once collected, the grab sample should be labeled and stored correctly until analysis can be performed. In conclusion, the concept of a grab sample plays a crucial role in environmental monitoring and assessment. While it offers a quick and straightforward way to gather data, researchers must remain aware of its limitations. By integrating grab samples with other sampling techniques and maintaining rigorous standards for collection and analysis, we can obtain a clearer picture of environmental health. This understanding is vital for making informed decisions about pollution control, resource management, and public health. Through careful application of the grab sample method, we can work towards a cleaner and safer environment for future generations.

在环境科学和工程中，术语grab sample指的是在特定时刻收集某种物质样本的方法。这种技术通常用于评估水、空气或土壤的质量。与复合采样不同，复合采样是在一段时间内多次取样然后合并，grab sample则捕捉环境的单一快照。这种方法的重要性在于它能够提供对特定介质当前状态的即时洞察。例如，当在河流中测试水质时，研究人员可能会决定在暴风雨事件期间进行grab sample，因为这可能会揭示被冲入水道的污染物。使用grab sample的一个优点是其简单性和速度。它允许研究人员快速收集数据，而无需复杂的准备或设备。然而，需要注意的是，虽然grab sample可以提供有价值的信息，但它们可能无法准确代表整体条件。这种局限性源于环境条件可能迅速变化。例如，如果研究人员在晴天从湖泊中进行grab sample，那么结果可能与在雨天进行的结果显著不同，因为雨水可能引入污染物。在许多情况下，grab sample与其他采样方法结合使用，以提供对环境条件的更全面理解。通过分析grab sample和复合样本，科学家可以更好地解读数据并得出更可靠的结论。此外，监管机构通常要求进行grab sample以进行合规监测，以确保工业遵守环境标准。收集grab sample的过程包括几个步骤。首先，研究人员必须确定采样的位置和时机，考虑天气、时间和潜在污染源等因素。接下来，必须选择适当的容器以防止污染并保持样本的完整性。一旦收集完成，grab sample应正确标记并存储，直到进行分析。总之，grab sample的概念在环境监测和评估中发挥着至关重要的作用。尽管它提供了一种快速简便的数据收集方式，但研究人员必须意识到其局限性。通过将grab sample与其他采样技术结合并保持严格的采集和分析标准，我们可以获得更清晰的环境健康状况。这种理解对于做出有关污染控制、资源管理和公共健康的明智决策至关重要。通过对grab sample方法的仔细应用，我们可以为未来几代人创造一个更清洁和安全的环境。