农业的可持续性不是一种选择,而是对后代子孙的必要责任。
A physical symbol system has the necessary and sufficient means for general intelligent action.
释义:只有连根拔除杂草,才能确保它不会再发芽生长。如果砍草时不除去根部,到了春天杂草还会再度生长。
There will be obstacles. There will be doubters. There will be mistakes. But with hard work, there are no limits.