它是溴已新的活性代谢物，与第一代和第二代祛痰药相比，它毒性低，祛痰作用强，是最常用的祛痰药之一。
Compared with the first and second generation expectorant drugs, it has much more powerful expectorant function and lower toxicity, and is one of most clinically-used expectorant drugs.
第二代改型(069型？)升级采用新的导航雷达在1997年研制。
The second-generation variant (Type 069?) upgraded with new navigation radar was introduced in 1997.
作为抗生素的第二代替代品，益生元已成为动物营养研究的新热点。
Being second-generation substitute of antibiotic, prebiotics have been the hotspot in the research of animals nutrition currently.
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