One way to hold this word: a closed tube full of oil. Press gently at one end and something far heavier rises at the other, slowly and steadily. Liquid will not squash, so a small push at this end becomes a big lift at that end.
From the word’s history
Wiktionary gives the form as hydraulic + -ics, the ending English uses to name a field of study (physics, mechanics, economics).
依本卷宗附的字源樹，這個字是 hydraulic 加上字尾 -ics。-ics 是英文用來替一門學問命名的字尾，physics、mechanics、economics 都是同一個家族。這也正好解釋了為什麼「學問」那個意思當單數看。
Wiktionary, "hydraulics"
登入就可以看每一支怎麼連回核心畫面。
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。
hydraulicsnoun/haɪˈdɹɒlɪks/
- 1
The engineering science that deals with practical applications where liquid is in motion and transmits energy.
- applied hydraulics
- The engineer specialized in fluid mechanics and hydraulics.
- 2
The hydraulic system of a vehicle or other machine.
- hydraulics system
- The brakes work on the principle of hydraulics.
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。