Fat is the major energy source needed for fetal development and protection.
在胎儿发育的过程中，脂肪是主要的能量来源，同时还有保护胎儿的作用。
The development and use of natural gas as a clean energy source will soon become a reality in China.
我国开发利用清洁能源天然气的时代即将来临。
The development and use of natural gas as a clean energy source will soon become a reality in China.
我国开发利用清洁能源天然气的时代即将来临。
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