In the end, the success of any technology is determined by its ability to solve real-world problems.
Scars have the strange power to remind us that our past is real.
农时:指春耕、夏耘、秋收三个时令。与其等灾荒来了再想办法补救,不如早防备灾荒,而防备灾荒最好就是抓住农时。