- 1推進力
Propulsion is the push that sends a vehicle forward. A car, a ship, a plane, or a rocket moves because something is driving it on; that driving force is propulsion. Engineers talk about a propulsion system — the engine, the fuel, and the parts that make the push. A rocket’s propulsion comes from hot gas shooting out the back; a boat’s may come from a in the water. The word is a little technical. In everyday talk people more often say “power” or “the engine.” You will meet it in science class, in space news, and in writing about cars and planes. Though actually, the old Latin verb behind it could mean “drive forward” and also “drive away.” In English today, propulsion is almost always the useful forward push, not shoving something aside.
From the word’s history
Borrowed from Medieval Latin propulsio, from Latin propello 'to drive forward'.
借自中世紀拉丁文 propulsio，來自 propello「向前推」。
組成Borrowed from Medieval Latin propulsio, from the past participle of Latin propello, “to drive forward, drive forth, drive away, drive out.”
同家族的字
- propelsame Latin verb propello, to drive forward
- propellerthe spinning part that makes the forward push
- propulsivethe adjective from the same Latin past participle
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
propulsionnoun/pɹəˈpʌlʃən/
- 1
The process of propelling, driving, or pushing, typically forward or onward; a propulsive force or impulse.
- 2
That which propels.
- However, nuclear propulsion provides a very high specific impulse and consistent, long duration energy source.
- This propulsion provides an initial velocity for the vehicle in a short time span.
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。