这句话表达了茅以升对桥梁建设事业的执着追求和不懈奋斗的精神。
The agriculture sector must adapt to meet the demands of a changing world.
The only limit to our realization of tomorrow is our doubts of today.
注释:恭敬、节俭、谦逊、守礼,这样才能自我坚守。深谋远虑,这样才能避免困厄。亲近仁德之士、结交正直之人,这样才能在危难时得到帮助。