Definition: to not allow something that is at a high level to fall to a lower level Level: B1
继续保持好工作！
___Keep ___up the good work!
确保你饮食得当——你必须保持体力。
Make sure you eat properly - you've got to ___keep your strength ___up.
我加入是因为我想保持我的英语水平，并且多学一些。
I joined because I wanted to ___keep ___up my English and also, to learn some more.
