名词
中文翻译：细胞系
同义词：
['subculture', 'subspecies']
例句：
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1.The researchers are working on developing a new cell substrain for cancer treatment.
研究人员正在开发一种新的癌细胞系用于癌症治疗。
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2.The scientist discovered a new substrain of bacteria that can resist antibiotics.
科学家发现了一种能抵抗抗生素的新细菌亚种。
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3.The team is trying to breed a substrain of rice that can withstand the drought conditions in the region.
该团队正试图培育一种能在该地区干旱条件下生存的水稻亚种。