A thruster is a small engine on a spacecraft, a rocket, or a submarine that shoots gas (or water) out in one direction so the vehicle moves in the other direction. That is the whole idea: push something out one way, and you go the other way. The big main engine gets the spacecraft off the ground; the thrusters are the small ones that do the careful work after that — turning the ship a little, tipping it up or down, holding it steady, moving it gently toward the space station.

A thruster is a small engine on a spacecraft, a rocket, or a submarinethruster是裝在太空船、火箭，或潛水艇上的一種小引擎 that shoots gas (or water) out in one direction朝一個方向噴出氣體（或水） so the vehicle moves in the other direction讓這個載具往反方向移動 That is the whole idea這就是整個原理 push something out one way, and you go the other way往一邊推出東西，你就往另一邊走 The big main engine gets the spacecraft off the ground大的主引擎負責把太空船送離地面 the thrusters are the small ones that do the careful work after that而thruster是接下來負責細部工作的小引擎 turning the ship a little, tipping it up or down, holding it steady, moving it gently toward the space station像是稍微轉一下船身、讓它上仰或下傾、讓它保持穩定、輕輕地把它移向太空站

Ships and boats have them too: a 'bow thruster' is a small propeller near the front that pushes the front of a big ship sideways when it is coming into port, where a normal propeller would be useless. The word is a plain job word: thrust (push) + -er (the thing that does it), so a thruster is 'the pusher'. Anyone reading about space understands it immediately.

Ships and boats have them too船隻也有這種裝置 a 'bow thruster' is a small propeller near the front「bow thruster船艏側推器」是裝在船頭附近的一個小螺旋槳 that pushes the front of a big ship sideways when it is coming into port在大船進港的時候把船頭往側邊推 where a normal propeller would be useless這種時候一般的螺旋槳是沒有用的 The word is a plain job word這個字是個很直白的工作名稱字 thrust (push) + -er (the thing that does it)thrust（推）加上-er（做這件事的東西） so a thruster is 'the pusher'所以thruster就是推的那個東西 Anyone reading about space understands it immediately任何讀太空相關文章的人都能立刻理解這個字

There is a second, quite separate meaning your students may meet online: in surfing, a thruster is a surfboard with three fins. That name comes from one man, Simon Anderson, who invented the design in 1980 — he never registered the name, so everyone just started using it for any three-fin board.

There is a second, quite separate meaning your students may meet online還有一個完全不同的意思，你的學生可能會在網路上遇到 in surfing, a thruster is a surfboard with three fins在衝浪裡，thruster是一種有三片尾鰭的衝浪板 That name comes from one man, Simon Anderson, who invented the design in 1980這個名字來自一個人——Simon Anderson，他在1980年發明了這個設計 he never registered the name, so everyone just started using it for any three-fin board他從來沒有註冊這個名字，所以大家就直接拿它來稱呼任何三片尾鰭的衝浪板

And in the gym, a 'thruster' is an exercise where you squat down and push a weight up over your head.

And in the gym, a 'thruster' is an exercise where you squat down and push a weight up over your head而在健身房裡，「thruster」是一種先深蹲、再把重量往頭上推舉的動作