现代的人平均寿命比以前短了。

Xiàndài de rén píngjūn shòumìng bǐ yǐqián duǎn le.

People today have a shorter average lifespan than before.

保持乐观是延长寿命的秘诀。

Bǎochí lèguān shì yáncháng shòumìng de mìjué.

Staying optimistic is the secret to a longer life.

人类的寿命正在不断延长。

Rénlèi de shòumìng zhèngzài bùduàn yáncháng.

Human life expectancy is continuously increasing.