柴油发动机可以使用植物油作为燃料，这将极大地促进使用该技术的国家的农业发展。

The happiest people are those who have found purpose while still appreciating life's simple joys.

"We are not seven, we are one. We are bulletproof."

The relation between what we see and what we know is never settled.

词语曾是我的祖国，而我被剥夺了它。

边界是地球脸上的伤疤，是暴力和分裂的标记。