Sustainability is not an option; it's a necessity for the future of agriculture and food production.

I think it's important to be able to have a sense of humor about life.

规律存在于物质之中，物质无不体现规律；物质存在于虚空之中，虚空无不包含物质。

解释：对别人的灾祸而幸灾乐祸是不仁义的，乘别人的危难去攻击不符合武德。