初级贩毒者落网后，供应链降级来填补这个缺口。
As junior dealers fall, suppliers drop down to fill the gap.
早在供应链进行测试，靠近初级生产的点，似乎是最有利的办法。
Testing earlier in the supply chain, near the point of primary production, might seem like the most advantageous approach.
对5种不同碳链的APG初级生物降解性进行了研究。
Primary biodegradation experiment of 5 APGs with different chain lengths was carried out.
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