美国食品和药品管理局还没有批准阿瓦斯汀用于眼部治疗，使用它来代替雷珠单抗可能会产生额外的安全风险，尽管这一风险也许很轻微。
The Food and Drug Administration has not approved Avastin for use in the eye, and using it rather than the alternative, Lucentis, might carry an additional, although slight, safety risk.
阿瓦斯汀目前被美国食品和药物管理局(FDA)批准用于治疗肺癌和结肠癌，但许多医生将其用于治疗乳癌。
Avastin currently is approved by the U.S. Food and Drug Administration (FDA) for treating lung and colon cancer, but many doctors use it to treat breast cancer.
阿瓦斯汀最严重的副作用（这些副作用有时可以导致死亡）有胃肠穿孔，伤口愈合并发症，出血和血块形成。
The most serious side effects associated with Avastin, in some cases resulting in death, are gastrointestinal perforation, wound healing complications, hemorrhage, and blood clots.
阿瓦斯汀是一种实验室内生产的分子物质，也就是众所周知的单克隆抗体，它能够模拟机体免疫系统产生的抗体来抵御有害物质。
Avastin is a laboratory-produced molecule known as a monoclonal antibody that mimics the antibodies produced by the body's immune system to defend against harmful substances.
阿瓦斯汀是一种实验室内生产的分子物质，也就是众所周知的单克隆抗体，它能够模拟机体免疫系统产生的抗体来抵御有害物质。
Avastin is a laboratory-produced molecule known as a monoclonal antibody that mimics the antibodies produced by the body's immune system to defend against harmful substances.
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