Premature birth is the main cause of perinatal mortality.

早产是围产期死亡的主要原因。

《柯林斯英汉双解大词典》

Flying debris is the main cause of broken Windows in tornadoes.

在龙卷风中，飞扬的瓦砾残片是打碎窗户的主要原因。

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Flying debris is the main cause of injuries and deaths in tornadoes.

飞扬的瓦砾残片是龙卷风中致伤或致死的主要原因。

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The Agriculture Department says poverty is the main cause of food insecurity and hunger in the United States.

VOA: special.2009.11.23

But Ban Ki-Moon said Tuesday that the evidence is "quite clear" that humans are the main cause of temperatures rising faster than expected.

VOA: special.2009.12.12

The main cause of skin cancer is ultraviolet radiation from the sun.

VOA: special.2010.07.06

Even after decades of research, the case that amyloid buildup is the main cause of the disease is hardly airtight.

FORBES: Magazine Article

For that reason, since heart failure is the main cause of death in such mice, their lifespans were not extended.

ECONOMIST: A way to counteract part of the process of growing old

Malaria is the main cause of death for children in Africa, killing a child every 30 seconds, the UN says.

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