Polymerized with suitable methods, additional polymer optical plastics with different functions, especially with high refractive index, can be obtained.

这些单体通过适当的方式聚合后，可得到具有各种功能尤其是高折射率的加聚型聚合物光学塑料。

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The surfactant and polymer mixed system slug is well on recovery ratio but the additional cost of ton oil is higher, economic benefit is not satisfactory.

而注表面活性剂和聚合物的复配体系段塞后热水驱虽然提高采收率幅度较大，但吨油新增成本较高，经济上不合理。

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It acts as an additional buffer to prevent the acidic polymer on the outside and stomach acid from reacting with the drug on the inside.

FORBES: Hard to Swallow