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来源：雅诚德英语网
In the past 40 years, scientists have pinpointed more than a dozen proteins, known as growth factors, that appear to be involved in angiogenesis.
在过去的40年里，科学家已明确指出，有超过一半以上的蛋白质作为生长因子，出现于血管再生活动中。
In the past 40 years, scientists have pinpointed more than a dozen proteins, known as growth factors, that appear to be involved in angiogenesis.
在过去的40年里，科学家已明确指出，有超过一半以上的蛋白质作为生长因子，出现于血管再生活动中。