For ecological studies, the most important factor is collecting identifiable samples of as many of the different species present as possible.
对于生态学研究来说，最重要的是收集尽可能多的不同物种的可识别样本。
To investigate the invisible life on our planet further, samples of many different environments are being collected and analysed.
为进一步研究我们这个星球上肉眼看不见的生命体，许多不同环境下的样本正在被收集和分析中。
Many studies have tested the relationships by different samples or applying different econometric approaches while there is still no consistent conclusion.
许多学者都以不同的样本或不同的计量方法研究过汇率波动和贸易量之间的关系，然而并没有得出一致的结论。
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