Because only one base layer can be active at a time, you can add as many base layers as you like, but the first one will be active by default.
由于一次只能激活一个基础层，所以可以随意添加很多的基础层，但默认地先激活第一个基础层。
The results not only confirmed the absorption of MPS but also showed that the active ingredient reaches the individual dermal layers in therapeutic effective concentrations.
研究结论证实MPS(多磺酸粘多糖)不但能透皮吸收，而且其活性成分能在各真皮亚层达到有效的治疗浓度。
The results not only confirmed the absorption of MPS but also showed that the active ingredient reaches the individual dermal layers in therapeutic effective concentrations.
研究结论证实MPS(多磺酸粘多糖)不但能透皮吸收，而且其活性成分能在各真皮亚层达到有效的治疗浓度。
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