投入工作：devotion
His devotion to the cause of education is well-known.
他对教育事业的献身精神是众所周知的.
投入钱财：investment
They should attract foreign investment.
他们应吸引外资.呃，我指的是学习方面的投入，也就是投入精力、全神贯注之类的一个名词，有木有啊就用 devotion 可以啊，学习和工作可以类比。还有我刚想到个 dedication 也行。我觉得 focus 也行吧？聚精会神的意思。奥，谢啦，您老人家再帮我翻译一个句子吧：有一种高尚是不声不响的，也正因为如此，它才格外惊心动魄。One kind of nobility is quiet and it sounds great for its quietness.