英语语法分析

There is an optimal speed at the lowest permeation ratio.

渗透率最低点对应的转速为最佳转速。

Conclusion: Theophylline transdermal patch has good permeation in vitro.

结论：茶碱贴片体外经皮渗透作用较好。

Therefore, the strategy of intercultural permeation must be carried out.

因此， 必须实施外教资源利用中的跨文化渗透战略。