"The effects of acid rain, encroaching development and harmful invasive species are taking a toll here," Hughes says.
休斯说：“由于酸雨的影响，领土被偷偷侵占，有害的入侵物种等种种原因，令公园风光不再。”
2
Some previous studies have suggested that DHA, an omega-3 fatty acid in fish oil, can aid in a baby's brain development if taken during pregnancy.
之前的研究表明怀孕的妈妈们摄入DHA，即鱼油中含有的欧米加- 3脂肪酸，有助于婴儿的大脑发育。
3
Three years earlier, researchers in Britain reported that combining streptomycin with a newer medicine, para-aminosalicylic acid, could reduce the development of drug resistance.