The phrase 'keep enthusiasm' is correct and usable in written English.
It is usually used to encourge someone to maintain enthusiasm and optimism in difficult situations. For example: "No matter how hard it gets, make sure to keep enthusiasm in your work."
Researchers are keen to keep enthusiasm to a manageable level.
Early on, it has been enough for Mr Modi to announce bold plans to keep enthusiasm ticking over.
But the Markey campaign is happy to leave the impression that the race is closer to prod donors to open their wallets and keep enthusiasm from flagging.
The organising push, dubbed Power Vote, aims to harness young people's unprecedented engagement in the US elections and keep enthusiasm high for stronger action against climate change.
He is scheduled to travel the state on Tuesday and Wednesday with Gov. Chris Christie of New Jersey at his side, hoping to keep enthusiasm high among Republicans who have been showing up in greater numbers at volunteer centers across the state this week.
Studying on influencing factors of work passion of CHS workers, promoting their work passion, and making them keep enthusiasm for work are significant.
The company's recent statements that it expects a record year in 2005, plus a Goldman Sachs upgrade, have kept enthusiasm high among gurus holding the stock.
It can get quite hard at times to keep that enthusiasm, so keeping that there is really important for me, making sure everybody is buzzing and, when we go out to train, we are training with a purpose.
"How do we keep the enthusiasm?
"They badger me about things, and it helps to keep our enthusiasm up".
That will tend to keep market enthusiasm a little bit contained".
