Holbrooke says the long-held notion that Afghanistan's illicit opium trade is the main source of funding for the insurgency is simply not true.
VOA: standard.2009.06.15
Glucose has to get into cells, that's the main source of energy source that cells use, metabolism of glucose.
但葡萄糖又必须进入细胞,因为它是细胞能量的主要来源,即通过葡萄糖代谢产生能量
You don't want to have TV as your main media source.
你并不想把电视作为主要的媒体信息来源。
(Speech) He says that today, the propaganda of arrogant nations of the world is the main source for the existence of conflict inside Iran.
VOA: standard.2009.12.07
So the main business of government consists in knowing how to control the elites because they are always a potential source of conflict and ambition.
因此统治的第一要务在于,懂得如何控制精英人物因为,他们往往是冲突和野心的潜在来源。
In developing countries, the main source of water pollution is not stormwater,but waste water.
VOA: standard.2010.08.04
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