A new study demonstrates what researchers say is the first successful use of genetic engineering to treat cancer 一项新的研究表明，研究人员所说的应用遗传基因工程学治疗癌症首次获得成功。
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A new study demonstrates what researchers say is the first successful use of genetic engineering to treat cancer 一项新的研究表明，研究人员所说的是基因工程学在治疗癌症方面的第一次应用获得了成功。
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At present micromanipulation system is mainly used for microinjection . microinjection is a crucial means for gene injection in modem gene engineering 现有的微操作系统主要是用来进行微注射操作的，微注射是现代基因工程学中重要的基因导入手段。
