評論
打印
1.Previous approaches to producing red blood cells have relied on various sources of stem cells which can only presently produce very limited quantities.
rely on信賴；依賴
He can rely on my support when the crunch comes.
關(guān)鍵時刻，他可以依靠我的支持。
2.Professor David Anstee, another of the researchers, told the BBC that his team has found a way to mass produce blood, but they now need the technology to actually do this on a large scale.
on a large scale大規(guī)模地
This movement has aroused the masses on a large scale.
這次運動,群眾發(fā)動的面很廣。
