biodegradable/ˌbaɪ.oʊ.dɪˈɡreɪ.də.bəl/形容词能进行生物降解的,可进行生物分解的Biodegradable packaging helps to limit the amount of harmful chemicals released into the atmosphere.可生物降解包装有助于减少排放到大气层中的有害化学物质的数量。想跟读,去练习