film base的用法和样例：
例句
- Microscopic needle-shaped crystals of herapathite are embedded in a plastic base.
将碘硫酸奎宁的微观针状晶体嵌于塑料片基之中。 - Thinner sheets of tough and can be used as colloidal silver compounds based on-chip, so that it became the first practical photographic film.
更薄和更韧的薄片可以用作胶状银化合物的片基，这样它就成了第一种实用的照相底片。
