el·bow grease
noun/ˈelbəʊ ɡriːs/
/ˈelbəʊ ɡriːs/
[uncountable] (informal)- the effort used in physical work, especially in cleaning or polishing something (= rubbing it until it is smooth and shiny)
苦干；（尤指费劲的）清洁，擦拭 - Using the right tool can save a lot of elbow grease.
使用正确的工具可以省去很多的力。
- Using the right tool can save a lot of elbow grease.