Experiments on plant hybridization require the most careful attention and great patience.

所以，国家的钱财不足以来应付饥荒，救济孤儿寡妇，这样，国家就贫困，百姓就难于治理。 

The world is a mirror, and it shows you what you bring to it.

世界正在快速变化，我们必须适应否则就会被抛在后面。