身體或腦力的出力
最直接的一種推：推的是自己的體力或腦力，推完就累。
noun · B2
Hard effort with your body or your mind, or the hard work itself. It is the kind of effort that uses you up, so people usually feel tired after it.
費力
核心畫面
You can picture exertion as force being pushed out from the inside until it shows. A body pushes effort out and the person sweats, breathes hard and sits down afterwards. Someone with authority pushes that authority out into a room, and what happens next is decided for other people. The thing being pushed changes; the pushing is the same.
exertion 可以想成「把裡面的力往外推出去，推到看得見」這個畫面。身體把力氣推出去，你會流汗、會喘，事後想坐下…更多收起
exertion 可以想成「把裡面的力往外推出去，推到看得見」這個畫面。身體把力氣推出去，你會流汗、會喘，事後想坐下來。有權力的人把權力推出去，房間裡的事就照他的意思發生。推的東西不一樣，但推這個動作是同一個。Two branches
權力或影響力的行使
同樣是往外推，只是推的不是肌肉的力，而是權力、影響力或壓力，被推動的是別人和事情。
noun · C1
The act of using power, authority, influence or pressure in order to make something happen.
行使；施加