Addiction develops after an initial exposure to the addicting substance or activity.

在接触成瘾物品或行为后，就会上瘾。

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Whereas at the time the interior of separated substance, although the composition of forces is smaller than initial composition of forces, the repulsion more than them make them separated quickly.

而这时候分开的物质内部，合力虽然小于初始的合力，但还大于他们的斥力，又使他们快速分开。

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Initial findings indicate that the substance appears to be effective in the treatment of certain medical conditions and the control of agricultural pests.

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But the new observational study (Abuse Rates and Routes of Administration of Reformulated Extended-Release Oxycodone: Initial Findings From a Sentinel Surveillance Sample of Individuals Assessed for Substance Abuse Treatment), suggests a breakthrough.

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Initial tests showed the device contained ammonium nitrate, the same volatile substance that sparked a massive explosion last month at a fertilizer distribution plant 110 miles north in West, Texas, said Austin fire Lt.

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