You can also see why a given plug-in is loaded, but the reason for a plug-in's activation may not seem as obvious because the causes are indirect.
您还可以查看一个给定的插件为什么被加载，但是插件的激活原因看起来不是那么明显，因为起因是间接的。
2
Therefore it is recommended to combine the yeast assay with the metabolic activation method based on H4IIE cell line to assay the direct and indirect estrogenic chemicals in environmental samples.