Straws can be made from different materials like paper, polylactic acid, stainless steel and plastic.
吸管可以由纸、聚乳酸、不锈钢和塑料等不同材料制成。
VOA 常速 2016年2月合集
There are environmentally friendly alternatives like polylactic acid plastic, or PLA, based on sugar from maize and sugarcane -- but they are more expensive.
目前有环境友好型的替代品,比如基于玉米和蔗糖中糖分制成的聚乳酸塑料(PLA)。
经济学人 Science and technology
Basilisk Healing Agent consists of tiny pellets that hold dried spores from a range of bacteria belonging to the genera Planococcus, Bacillus and Sporosarcina, together with nutrients including polylactic acid.